Charlotte Tilbury So 90s (was Birkin Brown) is a moderately warm-toned, medium-dark brown with a matte finish. It is a permanent lipstick that retails for $37.00 and contains 0.12 oz.
Charlotte Tilbury So 90s Matte Revolution Lipstick ($32.00 for 0.12 oz.) is a muted, medium-dark reddish-brown with warm undertones and a matte finish. It had semi-opaque color payoff that applied with smooth, even color without tugging on the lips. I wouldn't describe the payoff as buildable; it is as it applies initially, perhaps a little can be built up, but there's not much to go from where it starts. The color wore well for five hours and was neither drying nor hydrating.
This was previously named Birkin Brown.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Create the illusion of fuller, wider lips with my Matte Revolution – for lips that look lit from within. It’s a trick I use all the time on photo shoots, using lighting trickery, pigments and powders, and have been working for years to re-create this effect in the slick of 1 lipstick. Now everyone can create this full, matte lip effect in a long-lasting, buildable, hydrating formula – it’s the matte lipstick of the future! Exclusively enriched with Lipstick Tree extract which protects lips and is a natural anti-oxidant, and Orchid Extract which soothes and hydrates for a soft, buildable cashmere finish. Available in 10 modern-matte shades for all skin tones – 1 for each of my signature looks. Amazing Grace is inspired by Grace Kelly, a vintage tea rose for pretty, polished perfection a la Nicole Kidman and Miranda Kerr.