MAC Heroine is a very cool-toned, medium blue with a matte finish. It is a limited edition eyeshadow that retails for $17.00 and contains 0.05 oz.
MAC Heroine Eyeshadow ($15.00 for 0.05 oz.) is described as a "bright cobalt blue [with a matte finish]." It's a bluish-purple with cool undertones and a matte finish. Cinderella Fairy Godmother is several shades lighter. MAC Blue Orbit is more frosted. MAC Royale is deeper and darker. Urban Decay Blue Bus is pearly and purpler. NARS Self Portrait 1 #2 is somewhat similar in color. bareMinerals On the Rocks is bluer and iridescent. MAC Cobalt is brighter, slightly darker. Inglot #388 is darker.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
M·A·C Eyeshadow is a highly pigmented powder formula that applies evenly and blends well. Suitable for use either wet or dry, it's available in a wide variety of textures and finishes.