The rainbow version is kinda cute and also fits the possible ship because it would be all hearts and rainbows.

Unless you're kwritten (see her beautiful series "Blurring the Lines") or you're me and you try to write a B/T & B/S AU S6 fic in which Buffy thinks she's hiding everything but everybody knows, especially Dawn and Willow, and that goes way way angsty because - because it's me apparently. (No, I've never posted it. I might just though.)