Ignoring all the wires that have some sort of enamel coating to give them color (and also ignoring fancy metals like niobium and titanium, which can be turned pretty colors through exciting electrical processes), metal wire doesn’t come in very many different colors. Really only 3 dramatically different colors (reddish yellow being awfully close to either yellow – brass – or copper – rose gold).
There’s silver: silver, steel (stainless or galvanized), aluminum
There’s yellow: brass, gold, bronze
There’s reddish yellow: brass (sometimes), gold
There’s reddish brown: copper
I’ve been thinking about colors evocative of the seasons, and winter is easy: silver, accented with blue, grey, white, silver, mauve. Maybe some other very pale pinks and blues and purples: I see those in the cloudy winter sky.
Fall is also super easy: copper or yellow metal, accented with red, yellow, orange, brown. Maybe a little purple. (Why purple? I don’t know. It just seems right.) Maybe some dark green.
Spring is a little tricky, actually. Should it be silver accented with green? (And/or some early spring blossom colors, which tend to yellows and purples and blues, though of course tulips are any color you want.) Or yellow accented with green? Then what happens with summer? Because summer is where I get really stuck. Maybe summer should be yellow with green. But there are lots of different colors of flowers in the summer. So I don’t know. Light green for spring, dark green for summer?