Every time I start a new project, the same thing happens. I get the layout working, then I completely freeze on colors. I grab a color, drop it in, squint at it, change it, and half an hour later I've got something that's... fine. Maybe.
If that sounds like you, here's what finally fixed it for me.
Stop inventing colors from scratch
For years my mistake was trying to come up with a color scheme on my own — picking one color, then guessing what goes with it. It almost never looked right, and it ate up so much time.
The fix was simple: start from a palette that already works, then tweak it. When you begin with colors that are proven to look good together, everything after that is easy.
