skarasuko Unfortunately, it is not currently possible to change the color of folder icons. Instead, you can only change the color of the name by adding a color tag like [RED] or [#00FFFFF] to the folder name, but this affects not only the editor, but also the actual name in the exported skeleton data file:
(In the example above, the name of the physics constraint named body-down will be written in the skeleton data as [RED]girl/body-down).
It would certainly be useful if there was a way to change the color of the folder icons, so I have created an issue ticket for that: EsotericSoftware/spine-editor855
You can subscribe to this issue ticket to receive notifications when there is any progress on this issue.
