ok i struggled a bit here with what i wanted to do and ended up looking through your icons to see what i could match with, so i did 2 options.

first one i went with more of the sprite/anime colors and the second was eyedropped from the cinderella card i forgot the event name for,,, just depends on whether you want him to read as guy with silver hair or guy with blue hair.

i also thought a fun quirky wataru-ish thing would be if i changed the colors of the bits that frame his face to match his outfit (they're pink here)