# \#custom-color-table

**URL:** https://discourse.slicer.org/tag/custom-color-table/341.md

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## [Add Segment to SegmentationNode uses invalid color values (scalar) and adds a new colortable node](https://discourse.slicer.org/t/add-segment-to-segmentationnode-uses-invalid-color-values-scalar-and-adds-a-new-colortable-node/45498)

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**Author:** [@baderstine](https://discourse.slicer.org/u/baderstine)\
**Replies:** 5\
**Last updated:** [January 3, 2026, 11:28pm UTC](https://discourse.slicer.org/t/add-segment-to-segmentationnode-uses-invalid-color-values-scalar-and-adds-a-new-colortable-node/45498 "2026-01-03T23:28:36Z")

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Summary: I am attempting to import/edit/export segmentations from numpy to slicer to numpy. I am using custom color tables but am getting invalid color IDs on export after a segment has been added. For example, my col…

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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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## [Exporting a segmentation paired to a custom colortable](https://discourse.slicer.org/t/exporting-a-segmentation-paired-to-a-custom-colortable/35719)

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**Author:** [@jhlegarreta](https://discourse.slicer.org/u/jhlegarreta)\
**Replies:** 8\
**Last updated:** [April 27, 2024, 10:20pm UTC](https://discourse.slicer.org/t/exporting-a-segmentation-paired-to-a-custom-colortable/35719 "2024-04-27T22:20:08Z")

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Hi, I’ve been reading the threads about naming/numbering and the colormaps for segmentations: Export Segmentation as Labeled LabelMap Copying segment names/colors from one segmentation to another I am not sure to be …

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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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## [More than 256 colors](https://discourse.slicer.org/t/more-than-256-colors/13369)

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**Author:** [@MancaZerovnik](https://discourse.slicer.org/u/MancaZerovnik)\
**Replies:** 5\
**Last updated:** [September 8, 2020, 12:37pm UTC](https://discourse.slicer.org/t/more-than-256-colors/13369 "2020-09-08T12:37:29Z")

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Hi, I have a volume with multiple labeled instances and I would like to have more than 256 colors to show each instance with a different color. I tried to make a custom color table because all the existing ones are limi…