If you haven't tried a blue eyeliner, get thee to Avon's website. As part of its beachy, warm-toned Hawaiian Shores collection, the longtime brand is offering up this rather amazing Glimmersticks Eyeliner in Blue Flare — Ocean Shores (regularly $7, on sale now for $3). Not only does this self-sharpening eyeliner glide on easily, but it's an incredibly gorgeous hue: vivid without going into neon territory, yet still richly pigmented enough to add plenty of visual interest to the eyes. Besides, blue whitens and brightens, so you'll want to reach for this true blue hue again and again. Try the budge-proof liner on the lower lash lines for a hint of color, and pair it with a soft, shimmery neutral-toned shadow to give it a modern appeal.