Tetradic color schemes are made form two couples of complementary colors in a rectangular shape on the color wheel The level aa requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (at least 18pt) or bold text. They are very versatile, and work best with one dominant color.
Pin by Virginia Ávila on Outfit & Style in 2024 | Deep autumn color
Generate palettes with more than 5 colors automatically or with color theory rules save unlimited palettes, colors and gradients, and organize them in projects and collections
Regarding colors, the standard defines two levels of contrast ratio
Aa (minimum contrast) and aaa (enhanced contrast)
