Mauve (#E0B0FF) is a light, highly saturated purple hue. Mauve was the first synthetic dye, discovered by accident by William Perkin in 1856.
In RGB it is made of 224 red, 176 green and 255 blue. Its HSL hue angle is 276° with 100% saturation and 85% lightness, while its perceptual OKLCH lightness is 83% with a chroma of 0.119. For print, a starting CMYK mix is 12% cyan, 31% magenta, 0% yellow and 0% black.
As a text color on white, Mauve has a contrast ratio of 1.78:1, which fails WCAG AA even for large text. On black it reaches 11.82:1 and passes AA for normal text. If you use Mauve as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 71 for black text and Lc -37 for white text.
Its perceptual complement is #AAD784, close to pistachio. Colors that look most similar are periwinkle, lilac, pink. It looks fairly similar to people with red-green color blindness (ΔE 8), so its meaning mostly survives.