Dig this incredibly cool clock — the Coulheur. It’s described on the web site of design firm Moco Loco:

“Bettina Dadon’s clock takes the three primary colours, shades them off and divides them… on three transparent disks which are associated with the three time units respectively.”

Coulheur is, as the designers point out, a play on the words “color” and “hour” in French.

(Thanks to El Rey for this one!)