ColourPop Donut is a moderately warm-toned, light-medium coral with a matte finish. It is a permanent lipstick that retails for $6.50 and contains 0.11 oz.
ColourPop Donut Ultra Matte Liquid Lipstick ($6.00 for 0.11 fl. oz.) is described as a "bright peach." It's a lightly brightened, light-medium pink-coral with warm undertones and a very matte finish. It had mostly opaque coverage that went on fairly well. It dries down quickly but has a little time to work, and then once it dries down, it feels soft and thin without cracking when you smile. The color lasted for eight hours and faded a little more heavily towards the center of the lips but not to the point where it left an obvious ring. It was a little drying after five and a half hours of wear. ColourPop Solow (P, $6.00) is lighter, more muted, cooler. Make Up For Ever #4 (P, $19.00) is darker, glossier. Kat Von D Jeffree (P, $19.00) is brighter, cooler. NARS Dolce Vita (P, $25.00) is darker, warmer. ColourPop Topanga (P, $5.00) is darker, warmer, glossier. Kat Von D L'Ecole des Femmes (P, $21.00) is darker, brighter. MAC Make Me Gorgeous (LE, $16.00) is darker, warmer, glossier. NARS Natalie (P, $32.00) is brighter, cooler, glossier. Tom Ford Beauty Matthew (LE, $32.00) is more shimmery, darker, brighter, glossier. ColourPop Rocket (P, $5.00) is lighter, cooler, glossier. NARS Brigitte (P, $32.00) is lighter. See comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.