How To Watercolor Paint A Sunset Sky Without Reference Images
Step 5: Playing With Colors
As you near the top of your painting, mix in more Ultramarine Deep and Cobalt Blue to get more of a deep blue hue. Melt it into the purple section, allowing some to drift into the red area while avoiding the orange area. You can also tilt the paper and use gravity to help blend the colors even more.
For the topmost section, mix Cerulean, Peacock, and Cobalt Blue, and blend it into the sky. Add some of the blue into the purple and/or red area if desired, again breaking up any regular horizontal lines if necessary.