# \#color

**URL:** https://discourse.slicer.org/tag/color/226.md

[Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md)

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## [Change the color scheme of segmenation file](https://discourse.slicer.org/t/change-the-color-scheme-of-segmenation-file/44977)

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**Author:** [@Ruolin\_Li](https://discourse.slicer.org/u/Ruolin_Li)\
**Replies:** 1\
**Last updated:** [November 6, 2025, 2:03pm UTC](https://discourse.slicer.org/t/change-the-color-scheme-of-segmenation-file/44977 "2025-11-06T14:03:04Z")

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Hello! I’m trying to change the color scheme for the segmentation file I loaded in the 3D Slicer. My segmentation has 126 labels, and they’re currently displayed under the default color GenericAnatomyColors, which is no…

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## [SetColor() in scripting lost all light reflection effect](https://discourse.slicer.org/t/setcolor-in-scripting-lost-all-light-reflection-effect/43398)

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**Author:** [@chz31](https://discourse.slicer.org/u/chz31)\
**Replies:** 5\
**Last updated:** [June 18, 2025, 9:20pm UTC](https://discourse.slicer.org/t/setcolor-in-scripting-lost-all-light-reflection-effect/43398 "2025-06-18T21:20:52Z")

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Whenever I set up color using modelNode.GetDisplayNode().SetColor() in Slicer Pytho console or a python script, the model appeared to lose all the light reflection and material effects. If I just click the color tabl…

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## [VTK file "coloring"](https://discourse.slicer.org/t/vtk-file-coloring/40073)

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**Author:** [@Bor\_Antolic](https://discourse.slicer.org/u/Bor_Antolic)\
**Replies:** 0\
**Last updated:** [November 7, 2024, 7:07pm UTC](https://discourse.slicer.org/t/vtk-file-coloring/40073 "2024-11-07T19:07:29Z")

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With the use of model-to-model distance module I created a model that shows the thickness of left ventricular wall. I exported this file as a vtk. If I open this file in Paraview I have to always manually adjust the dat…

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## [I want to know how to colour the exported models](https://discourse.slicer.org/t/i-want-to-know-how-to-colour-the-exported-models/24476)

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**Author:** [@Luckypig](https://discourse.slicer.org/u/Luckypig)\
**Replies:** 21\
**Last updated:** [August 3, 2024, 5:25pm UTC](https://discourse.slicer.org/t/i-want-to-know-how-to-colour-the-exported-models/24476 "2024-08-03T17:25:57Z")

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Hello everyone, I find that the exported models have no color（STL format）.How can I make exported models have colors,because I find many people can make colorful models. Thanks to you all.

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## [Change viewing background from white to the standard](https://discourse.slicer.org/t/change-viewing-background-from-white-to-the-standard/36171)

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**Author:** [@Jessica\_de\_Kort](https://discourse.slicer.org/u/Jessica_de_Kort)\
**Replies:** 2\
**Last updated:** [May 15, 2024, 4:11pm UTC](https://discourse.slicer.org/t/change-viewing-background-from-white-to-the-standard/36171 "2024-05-15T16:11:28Z")

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Hello, last week I changed the background of the 3D view to be white and now I cannot see my segmentations. Is there a way to revert it back to normal? Here is an image about what I mean:

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## [Colormap loading issue after scene save](https://discourse.slicer.org/t/colormap-loading-issue-after-scene-save/36147)

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**Author:** [@connorh](https://discourse.slicer.org/u/connorh)\
**Replies:** 0\
**Last updated:** [May 14, 2024, 3:20pm UTC](https://discourse.slicer.org/t/colormap-loading-issue-after-scene-save/36147 "2024-05-14T15:20:49Z")

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I’m creating custom colormaps for a tool I’ve developed. If I create a continuous colormap I can save the scene, close, reload, and the colormap works as expect. When I create discrete colormaps, it works initially, but…

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## [Coloring Segments](https://discourse.slicer.org/t/coloring-segments/35497)

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**Author:** [@ljuno](https://discourse.slicer.org/u/ljuno)\
**Replies:** 1\
**Last updated:** [April 15, 2024, 9:27pm UTC](https://discourse.slicer.org/t/coloring-segments/35497 "2024-04-15T21:27:42Z")

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Hello, I am fairly new to 3D slicer and wanted to know if I could use different colors to highlight the nerves in my project: I made the whole brain as one segment, so I am unable to just change the color of the speci…

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## [tractography single color tract not multi-color tract](https://discourse.slicer.org/t/tractography-single-color-tract-not-multi-color-tract/29952)

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**Author:** [@GunnarE](https://discourse.slicer.org/u/GunnarE)\
**Replies:** 2\
**Last updated:** [July 24, 2023, 10:43pm UTC](https://discourse.slicer.org/t/tractography-single-color-tract-not-multi-color-tract/29952 "2023-07-24T22:43:20Z")

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Hi Slicer community, We have been following multiple tutorials from Dr. Sonia Pujol on diffusion tractography including “Exploring Peritumoral White Matter Fibers for Neurosurgical Planning”, “Diffusion MRI Analsyis”, a…

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## [relative dose value in color legend/DVH](https://discourse.slicer.org/t/relative-dose-value-in-color-legend-dvh/29114)

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**Author:** [@VVCJ](https://discourse.slicer.org/u/VVCJ)\
**Replies:** 0\
**Last updated:** [April 25, 2023, 11:14am UTC](https://discourse.slicer.org/t/relative-dose-value-in-color-legend-dvh/29114 "2023-04-25T11:14:39Z")

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Hi all, I input the CT and RTDose data to review the dose distribution. By default, the color legend and DVH shows the absolute dose value (Gy) stored in RTDose.dcm. I was wondering if I could show the relative dose (%)…

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## [Change background color of DVH graph](https://discourse.slicer.org/t/change-background-color-of-dvh-graph/27543)

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**Author:** [@Js165](https://discourse.slicer.org/u/Js165)\
**Replies:** 0\
**Last updated:** [January 30, 2023, 8:02pm UTC](https://discourse.slicer.org/t/change-background-color-of-dvh-graph/27543 "2023-01-30T20:02:24Z")

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Is it possible to change the background color (yellow) of the DVH graph to white? I also want to increase the x and y-axis tick size. I checked Informatics–\> Plot. But didn’t find the necessary options. Any help will be …

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## [How to create a color map based on the coordinate of pixels](https://discourse.slicer.org/t/how-to-create-a-color-map-based-on-the-coordinate-of-pixels/26086)

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**Author:** [@Jinlong\_Guo](https://discourse.slicer.org/u/Jinlong_Guo)\
**Replies:** 0\
**Last updated:** [November 5, 2022, 8:41pm UTC](https://discourse.slicer.org/t/how-to-create-a-color-map-based-on-the-coordinate-of-pixels/26086 "2022-11-05T20:41:29Z")

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Greetings, I am trying to create and apply a color map based on the thickness or z-coordinate of each pixel to the 3D rendering of one segment, which would be just like a height contour plot but I cannot figure out a wa…

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## [Open a segmented volume of 4 different phases](https://discourse.slicer.org/t/open-a-segmented-volume-of-4-different-phases/23277)

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**Author:** [@lolamartinalonso](https://discourse.slicer.org/u/lolamartinalonso)\
**Replies:** 1\
**Last updated:** [May 4, 2022, 11:58am UTC](https://discourse.slicer.org/t/open-a-segmented-volume-of-4-different-phases/23277 "2022-05-04T11:58:35Z")

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Hi, I have a segmented volume with 4 different phases. Each phase has a different value from 0 to 4 in the histogram. When I try to upload the volume (saved as .mrrda) it appears in black and white only. When in ImageJ …

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## [Display Colour Legend for Surface](https://discourse.slicer.org/t/display-colour-legend-for-surface/22520)

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**Author:** [@connorh](https://discourse.slicer.org/u/connorh)\
**Replies:** 4\
**Last updated:** [March 31, 2022, 1:00pm UTC](https://discourse.slicer.org/t/display-colour-legend-for-surface/22520 "2022-03-31T13:00:38Z")

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Hello, I’m working on an extension (in python) where I have a surface mesh with attributes that I’m colouring the mesh based on attribute value. I would like to add a colour bar/legend programmatically with the values …

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## [Only show base color](https://discourse.slicer.org/t/only-show-base-color/22509)

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**Author:** [@qiqi5210](https://discourse.slicer.org/u/qiqi5210)\
**Replies:** 1\
**Last updated:** [March 15, 2022, 3:35am UTC](https://discourse.slicer.org/t/only-show-base-color/22509 "2022-03-15T03:35:43Z")

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Hello,everyone.When I click on the red area I want to hide the window below Keep the select color widget I have read this article \[Segment Editor: reduce the number of mouse clicks to set basic colour for segme…

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## [Change default color palette for segmentation](https://discourse.slicer.org/t/change-default-color-palette-for-segmentation/20288)

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**Author:** [@sronen71](https://discourse.slicer.org/u/sronen71)\
**Replies:** 3\
**Last updated:** [January 13, 2022, 1:10pm UTC](https://discourse.slicer.org/t/change-default-color-palette-for-segmentation/20288 "2022-01-13T13:10:26Z")

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When I start a new segmentation in segment editor, and add segments, the default color palette (Color node) is GenericAnatomyColors. How can I tell 3D Slicer to use a different palette (Color node) as default? For exampl…

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## [Segmentation: the default green color is very similiar the bluegreen color](https://discourse.slicer.org/t/segmentation-the-default-green-color-is-very-similiar-the-bluegreen-color/20508)

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**Author:** [@tsinesh](https://discourse.slicer.org/u/tsinesh)\
**Replies:** 2\
**Last updated:** [November 8, 2021, 2:39am UTC](https://discourse.slicer.org/t/segmentation-the-default-green-color-is-very-similiar-the-bluegreen-color/20508 "2021-11-08T02:39:05Z")

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in the Segmentation Editor, the blue-green color automatically suggested by Local Threshold (picture 1) is very similar default green color for a new segmentation (picture 2). When I press Ctrl+left mouse to add a sugges…

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## [Segment Editor: reduce the number of mouse clicks to set basic colour for segment](https://discourse.slicer.org/t/segment-editor-reduce-the-number-of-mouse-clicks-to-set-basic-colour-for-segment/20236)

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**Author:** [@DIV](https://discourse.slicer.org/u/DIV)\
**Replies:** 6\
**Last updated:** [October 22, 2021, 5:01am UTC](https://discourse.slicer.org/t/segment-editor-reduce-the-number-of-mouse-clicks-to-set-basic-colour-for-segment/20236 "2021-10-22T05:01:38Z")

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If I wish to set a Basic Color for a segment I need seven mouse clicks (or six operations): double-click the relevant swatch for Segment color; click Color in the (badly named) Slicer dialogue box; click Basic tab in t…

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## [Color (RGB) volume rendering](https://discourse.slicer.org/t/color-rgb-volume-rendering/19732)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 0\
**Last updated:** [September 17, 2021, 11:56pm UTC](https://discourse.slicer.org/t/color-rgb-volume-rendering/19732 "2021-09-17T23:56:51Z")

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In recent Slicer Preview Releases, color volume rendering has been made much easier to access. While previously an alpha channel had to be created manually for rendering color RGB volumes, now the alpha channel is create…

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## [Unexpected behavior of color when using LUT with color count \< 255](https://discourse.slicer.org/t/unexpected-behavior-of-color-when-using-lut-with-color-count-255/18542)

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**Author:** [@squll1](https://discourse.slicer.org/u/squll1)\
**Replies:** 2\
**Last updated:** [July 10, 2021, 6:38am UTC](https://discourse.slicer.org/t/unexpected-behavior-of-color-when-using-lut-with-color-count-255/18542 "2021-07-10T06:38:11Z")

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Hello: The issue is first noted when I tried to reproduce a specific LUT in a commercial workstation by creating a custom LUT with 10 colors, and use it in a subtracted CT volume with standardized window and level ( ba…

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## [Change MarkupsCurve color programmatically](https://discourse.slicer.org/t/change-markupscurve-color-programmatically/11978)

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**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 2\
**Last updated:** [June 10, 2020, 3:55pm UTC](https://discourse.slicer.org/t/change-markupscurve-color-programmatically/11978 "2020-06-10T15:55:42Z")

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Hello. I’m trying to change the color of curve markups programmatically. The following snippet does not seem to work (color remains unchanged) and does not produce any error: markupNode = getNode('MarkupsCurve') displa…

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## [Coloring surfaces in slicer](https://discourse.slicer.org/t/coloring-surfaces-in-slicer/11202)

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**Author:** [@hcmidt](https://discourse.slicer.org/u/hcmidt)\
**Replies:** 20\
**Last updated:** [April 25, 2020, 3:02am UTC](https://discourse.slicer.org/t/coloring-surfaces-in-slicer/11202 "2020-04-25T03:02:13Z")

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Hello together, I have written a couple of python scripts to analyze CT scan images and would like to depict the results in slicer. My script returns a 3d array that assigns a thickness to each point on a surface (let’…

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## [How to assign default color table to a node](https://discourse.slicer.org/t/how-to-assign-default-color-table-to-a-node/7936)

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**Author:** [@Alex\_Vergara](https://discourse.slicer.org/u/Alex_Vergara)\
**Replies:** 1\
**Last updated:** [August 8, 2019, 12:38pm UTC](https://discourse.slicer.org/t/how-to-assign-default-color-table-to-a-node/7936 "2019-08-08T12:38:27Z")

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I wonder if this is too trivial for appearing here but I struggle for weeks before realizing that you can easily assign a color table to a node in python # First access the color table by name, the name is the one that …