With the recent change for labels to be black when not active/selected, the hardcoded colors of missing media/data-blocks make it hard to read. - Use a lighter color just like muted strips. - Makes active/selected muted strips draw labels in full opacity, for consistency. - Make muted strips a little less gray (50% instead of 80%) Pull Request: https://projects.blender.org/blender/blender/pulls/123494