We know armor attachments can be affected by armor coatings. If your Spartan wears Jun’s scarf and also uses his armor coating, the scarf turns from gray to green.
Same can be said if your Spartan wears Jorge’s chest attachment and also uses his armor coating, the chest attachment turns from gray to yellow and red.
Also the helmet attachment you see on Rosenda’s kit. The regular version is gray, but wearing both the attachment and using the armor coating will turn it white. Just like it is in the kit. And there are more examples.
But most attachments in the game are just plain gray. Making the attachments only look good on gray armor.
So really, how hard is it for these attachments to be affected by coatings? If it is possible for Jun, Jorge, Rosenda and all the others, why not for everything else?
And if for some reason it is really hard, just give us some basic color coatings for attachments like black, white, red, green, blue, yellow, et cetera, so we can try to fix things ourselves.