As the title suggests, these are chalks - or colours - that cheer me up.
I always arranged everything in colour (spectrum, ish, I guess) order when I was a kid. I couldn't understand kids who allowed their pencil tins to fall into haphazard, usage-based patterns. In fact, now, I have to suppress an urge to line up all my (many!) nail polishes and eyeshadows in neat little rainbows. Were you like me?