I definitely prefer solids but I wouldn’t pass on camo if on sale. Pants and rain gear would be my two biggest solid color items. Early season pants in solids just makes sense as they are probably getting used off season more than during season. Rain gear because I’m not in a rainy climate so again year round use makes more sense.
Color wise I like an ash brown or a sage green. Generally a lighter shade is best as most accessories (pack straps, holsters, etc) are dark which would break up the lighter shade clothing.