Favorite Triad combination

I have always loved painting with Ultra marine blue and Alizarin Crimson. I find they compliment each other, allowing for a myriad of purple hues. Neither of these colors is a staining pigment therefore it is easy to move the color around the paper as well as lift it off  easily when working wet-in-wet. Since I have been working in triad combinations this week, adding raw sienna, which a soft and subtle orange-yellow,  has given me the ability to create a beautiful array of soft grays as seen in the two 5 x 7 watercolor studies below.