The main difference between Indigo and Mauve is brightness and saturation: both are purple shades, but Mauve is lighter. Indigo (#4B0082) has an HSL of 275°, 100%, 25%, whereas Mauve (#E0B0FF) sits at 276°, 100%, 85%.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Indigo is more saturated (100% HSL vs 100%) so it reads as bolder and more memorable at logo scale, while Mauve can feel washed out when printed small.
Indigo hits a 12.95:1 WCAG contrast against white — safer for text-heavy interfaces — where Mauve only reaches 1.78:1 and risks failing AA at small body sizes.
Mauve is a warm tone that flatters spring/summer collections and warmer skin undertones, while Indigo leans warmer and is better suited to autumn/winter layering.
Indigo is the more muted of the two (100% saturation) and sits more calmly on large wall surfaces, while Mauve's higher chroma can overwhelm a room when used beyond accent pieces.
Indigo (#4B0082) is a dark, vivid purple with a warm-leaning undertone — it feels rich, serious, substantial and bright, energetic, eye-catching.
Mauve (#E0B0FF) is a very light, vivid purple with a warm-leaning undertone — it feels pale, delicate, gentle and bright, energetic, eye-catching.
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.