I just had a hankering to play with my Blue and Yellow watercolors. To experiment with stripes of each blue and then adding a yellow wash on each blue to see how they looked. I let the blue completely dry . Then added a medium wash of each yellow with out disturbing the bottom color. This way the bottom color shows through the top color and changes the look.
This is a bit different from what I usually do in my paintings.. Typically I bring two colors side by side and let them mingle and do their thing, and or mix it in the palette. I’ve added the beginnings of this project below. Which began with just drawing lines, adding the painting name at the top and sides. Then proceeded painting each blue, after they where totally dry did a medium wash of yellow over the blue. I think lighter washes would probably work better. When this technique is done right it can be so beautiful.