For Kasumi, Pink or blue with yellow accents would be good, since those are her signature colors...except for milky pink, which is actually her favorite color. Ayane in purple is always a great choice, but these are just suggestions. Whatever color you think reflects the outfits the best should definitely be used
@Kasumilover98 see I was thinking about that but then again since it's Halloween theme & I made kasumi a vampire costume I was thinking of just doing black or different shades of it
& for ayane I was thinking o making her coat like a dirty pale-ish green & her pants black! & make her top like yellow or almost golden