One of the many blogs I read is Knitting on Impulse. Although her medium is yarn and ours is cloth and thread, I thought you might be interested in a series she is running about Playing with Colour (she's in Canada).
She takes a photograph, pulls the colors out of it and then uses the colors in a knitting design. It's really fascinating stuff! She calls it Patterns in Nature and it is simply scrump-dilly-icious!