Right there next to yellow on the colour wheel, orange is a warm nail polish hue that can boost your energy and optimism. "From poppy red to vivid peach, orange undertones signal that [warm weather] is here," said Eleanor Langston, chief creative officer of Paintbox in New York City. "Corals, peaches, and salmon shades are the modern version of millennial pink and are ultraflattering on all skin tones."