Urban Decay Sideline is a moderately warm-toned, duochrome with a light gold base and shift between gold, green paired with a metallic finish. It is a discontinued eyeshadow that retails for $19.00 and contains 0.05 oz.
Urban Decay Sideline Eyeshadow ($18.00 for 0.05 oz.) is described as a "gold with green shift." It's a light-medium, yellowed gold with a green sheen--the gold gets lighter and darker (more orange-gold) as you angle the shade. The shift is definitely visible on the lid, but I would describe it as a moderate duochrome effect. It had excellent color payoff with a creamy, smooth consistency that applied well and blended out beautifully. The color lasted for eight and a half hours on me. Hourglass Color Field #2 (P) is cooler-toned, less shift. MAC Vicuna (LE, $16.00) is darker, no shift. Makeup Geek Magic Act (P, $9.99) is lighter, no shift. ColourPop Get Lucky (P, $5.00) is darker, no shift. Chanel Rêve d’Orient #3 (LE) is darker, no shift. Tarte Up to No Gold (LE) is darker. MAC Old Gold (P, $21.00) is darker. MAC Unwind (P, $16.00) is darker, no shift. MAC Gorgeous Gold (P, $16.00) has less shift. L'Oreal Gold Imperial (LE, $7.99) has no shift. bareMinerals Standing O (P) has less of a shift. Get comparison swatches / compare dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Urban Decay’s groundbreaking new eye shadow formula. This reformulation of Urban Decay’s eye shadow features even softer, amazingly velvety texture; richer, more dense and decadent color; smoother, more uniform pigment distribution and blendability; and longer-lasting, more crease-free wear. The new line of shadows features a completely revamped assortment of shades, new textures, and a totally redesigned token compact. The secret to the new formula is Urban Decay’s Pigment Infusion System™, a vehicle for color that holds tightly to pigment and gives the formula its glide. The proprietory blend of ingredients allows color to weave itself through the formula resulting in insane color payout, color that stays on your lids, and sparkle that doesn’t fall. The amazing technology works for every shade and finish. Every Urban Decay shade is silky, blendable, and stays put.