Just a “general” rule of thumb, but not to put yourself into a “rut”…….
Clear water/clear skies: more neutral colors of blue, purple, whites with silver blades. You want to “match the hatch” here for a starting point. “Silver flash” is common to see sparkling in the water when baitfish scatter, right? (firetiger)
Clear water/dark skies: Start blending colors or color blades on nuetral color hair. Greens, blues, blacks, yellow, browns. (firetiger)
Dark water/clear skies: Again, start adding more color and look at brass blades. Color constrast can be good! Black/orange, black/red, chartruese/black, browns, yellows. (firetiger)
Dark water/dark skies: gold, orange, black, chartruese. Gold blades or colored blades. (firetiger)
Yea, I said firetiger a lot, didn’t I? Point is, Firetiger has caught fish for me in every water color/sky condition for me.
Mostly though, don’t be afraid to match the hatch.
Basic sucker patterns, walleye patterns, smallie patterns, crappie/sunnie patterns, and mostly PIKE color patterns. (people forget this pattern).
Again, don’t get caught up in the rut of color, but put yourself in the right “mode” to build your confidence.