CSS named color
Indigo #4B0082
Indigo is dark vivid violet. Below: every color format, WCAG contrast against black and white, its tints, shades and tones, and the harmonies that pair with it.
Color values
Contrast & accessibility
WCAG contrast ratio of Indigo used as a foreground on white and black backgrounds.
Aa The quick brown fox
12.95:1
On white
AA ✓ AAA ✓ AA Large ✓
Aa The quick brown fox
1.62:1
On black
AA ✕ AAA ✕ AA Large ✕
Tints, shades & tones
Systematic variations of Indigo — click any swatch to copy its hex.
Tintsmixed toward white
Shadesmixed toward black
Tonesmixed toward gray
Color harmonies
Palettes built from Indigo by rotating its hue. Each swatch links to its closest named color.
Complementary
Analogous
Split-complementary
Use Indigo in your stack
Tailwind (arbitrary value)
Works for any property: text-[#4b0082], border-[#4b0082].
CSS custom property
Reference it anywhere with var(--color).
Build a full theme
Turn Indigo into a complete shadcn/ui palette — light & dark, contrast-checked, one-command install.
Extract a theme →