86/100 tiny painting challenge for 2025 (Patreon)

Rainbow for 86! A little pause on the fall paintings to work on a much requested topic: rainbows! This one can be tricky, but the process is simple. I even added a little oopsie moment when my entire rainbow didn't work. In this painting I used a 3/8" flat brush, added the paint to the edges of the damp bristles and gently swiped the color across the page. I can't wait to see how you do with this one! Please let me know if you have any questions.

Paper: arches 140 lb cotton 9X12" paper that I've cut into 3X3" pieces, giving me 12 pieces per page.

Paint: The palette I'm using today is the split primary palette by letter sparrow: cad yellow deep, lemon yellow, cad red, magenta, ultramarine blue, cerulean(probably closer to phthalo blue), indigo and sap green. I don't use all the colors, but I will name them as I mix them. Feel free to use pre mixed convenience colors as well.

Brushes: round 4 & 10- Princeton brand, 3/8" flat - master's touch

Private youtube link to watch if you need captions or translation: https://youtu.be/7xfjm2tg4Ao