There’s been a lot of buzz around Kosås (example: massive New York Times Magazine feature), and rightly so. These are among the most weightless, modern, beautifully wearable color cosmetics around, boasting enviable performance and perfectly flattering shades along with green-beauty-approved formulas. Read on to learn how founder Sheena Yaitanes — a fine artist with a chemistry background — creates her colors. She’ll also share her secrets for picking and applying the best ones for you.