That's a strange word isn't it. This Play Date Cafe challenge is looking at colors that clash. Their choices for this challenge are: hot pink, navy blue and mustard.
The Happy Birthday stamp is from Sparkle n Sprinkle. The rose is from Spellbinders and I used my Scor Pal to score the mustard layer which was sponged with Memento Cantelope.
I think they go together just fine.