It's a experiment of coloring by program. We can make any color from red and white sprite. Square button #1 : Adjust scratch's effect directly. Square button #2 : Make color with Hue, Saturation, and Brightness. Square button #3 : Make color with Red, Green, and Blue. Circle button #1~5 : Change a picture.
I found this method when I was playing with color effect. It maybe can make any color you want. Enjoy scratch! Japanese version http://scratch.mit.edu/projects/15105400/