The main difference between Purple and Lilac is brightness and saturation: both are magenta shades, but Lilac is lighter and Purple is more saturated. Purple (#800080) has an HSL of 300°, 100%, 25%, whereas Lilac (#C8A2C8) sits at 300°, 26%, 71%.
Purple (#800080) is a dark, vivid magenta with a warm-leaning undertone — it feels rich, serious, substantial and bright, energetic, eye-catching.
Lilac (#C8A2C8) is a light, muted magenta with a warm-leaning undertone — it feels airy, soft, approachable and subdued, sophisticated.
Text legibility depends on the contrast ratio between foreground and background. WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Use these numbers to choose accessible combinations for your design.
Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.