ColourPop 1st Base is a moderately warm-toned, light-medium pink with a matte finish. It is a limited edition lipstick that retails for $6.50 and contains 0.11 oz.
ColourPop 1st Base Ultra Matte Liquid Lipstick ($6.00 for 0.11 fl. oz.) is described as a "mid-tone true pink." It's a light-medium pink with subtle, cool undertones and a very matte finish. This pulls almost warm-toned me, due to my yellow undertones, but I expect it can look more neutral-to-cool depending on your coloring or what other makeup you're wearing that day. It applied fairly evenly with good color coverage, but it dries quickly and tends to "crack" once dried (you can see it coming apart just slightly where you have deeper lip lines). It lasted for eight hours but the color pulled into lip lines noticeably. This shade was slightly drying after five hours of wear and worsened from there. Marc Jacobs Beauty Jolly Molly (220) (P, $30.00) is brighter, cooler, glossier. Kat Von D Jeffree (P, $19.00) is darker, warmer. MAC Nouvelle Vogue (LE, $16.00) is darker, glossier. Tom Ford Beauty Pink Tease (03) (P, $50.00) is lighter, warmer, glossier. NARS Marisa (P, $32.00) is cooler, glossier. Bite Beauty Sweety (LE, $24.00) is brighter, glossier. Maybelline Pink Sugar (P, $7.99) is darker, more muted, warmer, less glossy. See comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.