# Changing a single segment 2 different colors

**URL:** <https://discourse.slicer.org/t/changing-a-single-segment-2-different-colors/41562>\
**Category:** Support\
**Created:** [February 7, 2025, 4:41pm UTC](https://discourse.slicer.org/t/changing-a-single-segment-2-different-colors/41562 "2025-02-07T16:41:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![BDhoth](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/bdhoth/32/78752_2.png) [@BDhoth](https://discourse.slicer.org/u/BDhoth)\
**Post date:** [February 7, 2025, 4:41pm UTC](https://discourse.slicer.org/t/changing-a-single-segment-2-different-colors/41562/1 "2025-02-07T16:41:41Z")

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Is it possible to circle an area of a segment and turn it a different color? Ex. I have the ventricles segmented and would like the inferior half to be a different color than the superior portion. Is there a simple way to do this? Thank you!

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**Author:** ![mikebind](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Post date:** [February 7, 2025, 5:58pm UTC](https://discourse.slicer.org/t/changing-a-single-segment-2-different-colors/41562/2 "2025-02-07T17:58:56Z")

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I don’t think there is a one-step tool that does this, but it is easy to achieve in a few steps in a few different ways. Here are two options:

1. Using masking settings: Assuming your initial segment is S. Add a new segment T, select it and choose the Paint tool. Adjust masking settings so “Editable area” is “Inside S”, then paint the area you want to have a different color. If you have “Modify other segments” as “overwrite all” or “overwrite visible”, then S will be erased where you paint in T.
2. Using logical operations: Add new segment T and use “Logical operators” copy to make T a duplicate of S. Make sure “allow overlap” is chosen in the “Modify other segments” masking setting, to avoid having T erase S completely. Use Scissors (or any other modification tool you want) to get rid of the part of T that corresponds to the part of S you want to remain the original color. Lastly, select segment S, and use logical operators subtract to subtract T from S.

Either method will give you two separate segments which you can color independently and which, combined, compose your original segment.

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**Author:** ![BDhoth](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/bdhoth/32/78752_2.png) [@BDhoth](https://discourse.slicer.org/u/BDhoth)\
**Post date:** [February 7, 2025, 6:42pm UTC](https://discourse.slicer.org/t/changing-a-single-segment-2-different-colors/41562/3 "2025-02-07T18:42:21Z")

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Thank you! That makes perfect sense.