If Instagram is anything to go by, though, clusters of dots are giving way to a single one — and it’s surprisingly chic. The solitary speck is elevating French manicures everywhere and, unlike full polkadots, requires just one precise motion from your nail artist. Advertisement ADVERTISEMENT What is the single-dot French manicure, and how do you achieve it? The single-dot French manicure swaps a scattering of polkadots for one oversized stipple, and the effect feels distinctly retro. In most iterations we’ve seen, nail artists start with a nude base. Each French tip is painted a different color — some in bright neons to usher in summer, like this manicure by Lucy Inman , others in more muted shades that nod to the ’60s, like this set by Nicole at The Humble Room . The only rule? Every tip needs a contrasting dot to make it pop. Unlike a polka-dot pattern, there are no hard-and-fast rules when it comes to placement.…