Mix-and-match, ombré , simply gradient — whatever you want to call the trend, it's blowing up on Instagram right now . The best part is that anyone with opposable thumbs and five different bottles of polish can pull it off. Tenoverten nail pro Nadine Abramcyk tells us that the key to a cohesive multicoloured manicure is to choose your polishes carefully. "I always recommend a range of shades in the same colour family," she says. Paint each nail a different colour, and you get a shade transition that feels purposefully mismatched.