Love this idea, except I'd use teal and blue paint instead !
Partiesdescrap: Art-Journal episode#6
aquarela+doodles: the thicker the watercolor + the less water you use, the better. make simple shapes (circles, squares, rectangles, etc). once dry, make doodles and drawings outlining the shapes with black pen. use white pen for details (balls, hearts, circles, etc). you can use this as a doodle by itself orrr turn it into a background for a scrapbook pg or art jounral (see: http://maisarmendonca.blogspot.com/2011/06/aquarela-faca-seu-proprio-papel.html)