MAC Silly is a moderately cool-toned, medium-dark pink with a matte finish. It is a limited edition lip liner that retails for $17.50 and contains 0.05 oz.
MAC Silly Lip Pencil ($15.00 for 0.05 oz.) is described as a "bright pink." It's a medium, brightened pink with subtle cool undertones and a totally matte finish. The closest dupe I could think of was MAC Hip 'n' Happy, which isn't as bright and has a much cooler undertone.
A pencil in a wide range of colours designed for shaping, lining or filling in lips.