3 SEE OFF SALLOW SKIN

This skin type can often have a slightly yellowy tinge to it, making you appear older. Paradoxically, a cooler colour can inject radiance and, while YSL Touche Éclat Colour Correcting Blur Primer, £30, might not look like your typical makeup colour, its blue tint counteracts the yellow. Applied all over the face, it’ll give your complexion a natural lift.