In 2021, the trend for winter nail art often included cool and sophisticated designs. These might feature dark colors like black, dark blue, or deep red, with geometric patterns or minimalist motifs. Some popular ideas included metallic finishes, icy blue or silver glitters, and winter-themed decorations like snowflakes or pinecones. For a high-cold style, you might look for bold contrasts and icy tones to achieve a chic and modern look.