“Hour indicator which is on the bottom layer uses a 100% to 0% blue gradient and the Minute indicator uses a 100% to 0% yellow gradient. Overlapping both layers create a color mixing result thus producing an ever changing clock face color! It allows the user to learn a new way of interpreting time by understanding mixture of different colors.”
Visualize Time in Color Form with ZIIIRO’s New Wristwatch Designs - Core77
The one on the right is mighty fine.