What determines what color the wings are when you get them? Because when I save edit them in their white, but when I get them naturally in game Dark Sylvan is red and Sylvan is blue.
If there's a Wing Style status effect, it uses it's tooltip if one is provided; if no tooltip is present, it takes its first value and uses that as the texture for the following steps.
If the wings' texture is Furred (no naturally-occurring types, outside Wing Style) or Feathered (Avian, Dove), it uses your fur colour; if their texture is Scaled (Demonic, Small Demonic, Frostwyrm, Shark, Gryvain, Draconic, Small Draconic) or Chitinous (Mothrine), it uses your scale colour.
Otherwise, the colour is hard-coded for certain types: iridescent for Dragonfly, transparent for Bee, Small Bee or Myr, blue for Sylvan, and glittering black for Dark Sylvan.
Know nothing about the code of the game, but maybe Wing Style just affects them because, by messing with it, the game makes it take priority over your actual wing description?