Lilac (#C8A2C8) is a light, muted magenta hue. Lilac is a soft pinkish purple named after the spring flower.
In RGB it is made of 200 red, 162 green and 200 blue. Its HSL hue angle is 300° with 26% saturation and 71% lightness, while its perceptual OKLCH lightness is 76% with a chroma of 0.068. For print, a starting CMYK mix is 0% cyan, 19% magenta, 0% yellow and 22% black.
As a text color on white, Lilac has a contrast ratio of 2.22:1, which fails WCAG AA even for large text. On black it reaches 9.46:1 and passes AA for normal text. If you use Lilac as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 60 for black text and Lc -48 for white text.
Its perceptual complement is #95BD97, close to sage green. Colors that look most similar are silver, mauve, dusty rose. It looks fairly similar to people with red-green color blindness (ΔE 6), so its meaning mostly survives.