UI - beckground color for elements in collections

Problem: In large scenes, it can be difficult to visually identify where a Collection starts and ends in the Outliner. Even with collection color tags, the objects inside the collection do not inherit any visual grouping, making navigation and scene organization harder.

Solution: Extend Collection color tags to affect the background or outline of the items inside the collection. Similar to folder visualization in Substance Painter, objects inside a colored collection could display a subtle tinted background, border, or grouping highlight. This would improve readability- like in substance painter 3D atleast