With all the attention being paid of late to nail polishes and salons filled with hazardous chemicals, it’s refreshing to see a brand dedicated to formulas free of harmful toxins like formaldehyde and toluene, paired with edgy, modern colors that define trends instead of following them. Each season, RGB introduces rich new hues to its 10 classics, and best of all, each high-shine enamel is made in the USA. $16