Oh I see… yeah no, I don’t think anything like this exists from the. You can however create a post process shader that targets a specific color with a mask, you can then “overwrite” that color. It’s however all very technical for someone who doesn’t know much about shaders.
On a separate note, this may be helpful: Tangent Control Surface Support in Code Plugins - UE Marketplace and UCOLOR - Color Grading Interface in 2D Assets - UE Marketplace.