Lineage colors themselves should be stable. What you’re probably seeing is the transparent colored zone backgrounds, which visually tint organisms as they move through different niches. That’s intentional, to give quick visual feedback about which environment they’re in.
Lineages can change color if they diverge enough to be treated as a new distinct lineage, but that’s a separate case.
Lineages can change color if they diverge enough to be treated as a new distinct lineage, but that’s a separate case.