1. Rainbow Nails 2021.This is the season to go as bright, warm, and tropical as the weather! Create a fruity cocktail of bold shades – think pink, green, red, yellow, and blue. When summer arrives, the rules go out the window, and it’s time to show off your creativity in manicure form. Plus, there are no gloves to hide behind – so your nails can get all the attention they deserve!