there was once a headcanon, i think it was from way back on this blog in fact, where proudly showing your blood color means you are not afraid and believe you are strong. for example, Vriska wears blue because she's cocky and proud, Kanaya i more modest, but she applies green lipstick after she kills Eridan. so the headcanon is this: low bloods naturally show off their blood color as a defense mechanism, to falsely boast themselves. more reasonable than doc scratch putting make-up on a baby

That’s a rather nice headcanon.

I’ll take it.
~Mod T