MUA Intense Colour Lip Liner – Obsession for Bold Nude Definition: Improved Formula with Buttery Texture. The bestselling Intense Colour Lip Liner returns with an enhanced buttery formula that glides effortlessly on the lips, offering intense color payoff and full coverage. The Shade Obsession is a deep brown-toned nude, perfect for bold outlines or 90s-inspired lip looks. Vegan Formula & Recycled Cap. Available in 12 bold Shades, with a vegan & cruelty-free formula, and a cap made from 30% recycled plastic for a more sustainable choice.