9×7″ acrylic, collage on matboard
This one began with a scrape of some leftover paint on my palette from another painting. I collaged a small piece from a shade sample (the rectangular two-tone piece) on top of that. Then I added some brushed-on acrylic (cerulean blue) to either side of the scraped-on area, and enhanced the middle red with some alizarin crimson. The final addition was an almost black line on top of (and extending beyond) the collaged piece.