I've said it before, inspiration is truly all around us. Don't miss the subtlety. Even in the simple childhood memory of sidewalk chalk! What gloriously calm color inspiration.
Chalk isn't one of those catchy word phrases usually used for design resources. So if you must, let us instead call it things like "soothing", "a gentle calm", "tranquil".
Along with images of the color palette of sidewalk chalk comes the sun that accompanied those great childhood times and the artwork created from that chalk. Hopscotch and tic-tac-toe. Not bad for inspiration.