Welcome indeed.
Tom is likely your best bet for eyeballing colors and guessing a recipe if nobody has one.
I tend to eyeball as well, but I don't care about perfect matches because I 'm only looking for general color patterns and don't sell my baits. Plus, I'm rather lucky to live where I do as the fish in my waters eat what I throw out of pure benevolence.

Try to have fun experimenting and learning rather than getting frustrated over imperfect patterns.