I found this while browsing the forums on Specktra and thought it’d be fun to add here too. You’re supposed to list your favourites based on colour and/or texture for the given shade of the ‘rainbow’.

MAC Eye Shadow Rainbow
WHITE: Gesso
OFF WHITE: Blanc Type
RED: Post Haste
ORANGE: Sunsplosion
YELLOW: Bright Sunshine
YELLOW-GREEN: Eyepopping
GREEN: Bio Green
BLUE-GREEN: Gulfstream
PINK: Sushi Flower
PINK-PURPLE: Star Violet
PURPLE: Parfait Amour
BLUE-PURPLE: Violet Trance
BLUE: Clarity
TAUPE: Style Snob
BROWN: Tete-A-Tint
BLACK: Typographic
GRAY: Apres Ski
HIGHLIGHT: Goldbit
GOLD: Woodwinked
SILVER: Silverthorn
DUO CHROME/UNSURE: Vellum
MINERALIZED EYESHADOW (MES): Sea & Sky
I am a M.A.C. fanatic!!! Their colors are always so vibrant & radiant!!! Those swatches are very springy I love it! I just wish they’d come out with an eyeshadow palette already!
You and me both.. I love MAC. I actually keep my eye shadows in the 15 pan pro palettes. If you take out the dividers you can fit 26 I believe. :] Very convenient.