Estee Lauder Blackened Plum is a very cool-toned, very dark purple with a matte finish. It is a limited edition eyeliner that retails for $20.00 and contains 0.04 oz.
Estee Lauder Blackened Plum Pure Color Intense Kajal Eyeliner ($20.00 for 0.04 oz.) is a deep blackened purple that leans a little cool-toned. It's not quite your violet, blue-based purple, but it's nowhere near eggplant or burgundy. I couldn't think of anything that comes close to the level of darkness (without being black)--the closest purple I could think of was L'Oreal HIP Violet Volt, which is much lighter and shimmery to boot! Between the darkness and not-quite-cool-tone, I think this will be an excellent alternative to black eyeliners on all skin tones and against all eye colors. It's a great way to accent a smoky eye!