Indigo Color Code: #4B0082, RGB, HSL & CMYK

Indigo color values

HEX #4B0082

RGB rgb(75, 0, 130)

HSL hsl(275, 100%, 25%)

HSV 275, 100%, 51%

HWB hwb(275 0% 49%)

CMYK 42%, 100%, 0%, 49%

Decimal 4915330

CSS keyword indigo

25%HSL lightness (dark)

100%HSL saturation (vivid)

275°Hue angle (violet)

0.031Relative luminance

CMYK is a standard screen-to-print conversion. Printed results depend on inks, paper and color profiles.

What is Indigo?

Indigo is one of the named colors defined by the CSS Color specifications (keyword “indigo”), so every modern browser understands it without a hex code.

Its hue angle of 275° places it in the violet part of the color wheel, with 100% saturation (vivid) and 25% lightness (dark). It sits between warm and cool.

Compared with the other purple colors in the Aqeeb Studio library, it is lighter than 18% of them and more saturated than 82% of them.

Its relative luminance is 0.031, which makes it a dark color. That is below the 0.179 crossover point at which black and white text have equal contrast, so white text has the advantage.

Indigo counts as a dark color: its HSL lightness is 25% and its relative luminance is 0.031. White text reads comfortably on it (12.95:1 contrast).

Text contrast on Indigo

WCAG contrast of white and black text on Indigo
Text	Preview	Ratio	AA normal	AA large	AAA normal	AAA large
White text	Sample text	12.95:1 Excellent	Pass	Pass	Pass	Pass
Black text	Sample text	1.62:1 Poor	Fail	Fail	Fail	Fail

Ratios use the WCAG 2 formula and are truncated, never rounded up. Test any pair with the contrast checker.

Colors that go with Indigo

Complementary color

Complementary colors sit directly opposite each other on the color wheel (180° apart). They give the strongest hue contrast, which suits calls to action and accents.

≈ Dark Grass Green#378200

Analogous colors

Analogous colors are neighbors on the wheel, 30° either side of the base hue. They blend smoothly and are easy to combine in backgrounds, gradients and illustrations.

≈ Navy#0A0082 ≈ Purple#820078

Triadic colors

A triadic scheme uses three hues spaced 120° apart. It is lively yet balanced, and works best when one color leads and the other two act as accents.

≈ Medium Brown#824B00 ≈ Jungle Green#00824B

Split-complementary colors

Split-complementary keeps the base color and uses the two colors on either side of its complement (150° and 210°). The contrast is strong but gentler than a direct complement.

≈ Swamp Green#788200 ≈ Green#00820A

Tetradic colors

A tetradic (rectangle) scheme combines two complementary pairs at 0°, 60°, 180° and 240°. It offers variety but needs one dominant color to stay balanced.

≈ Bordeaux#820037 ≈ Dark Grass Green#378200 ≈ Jungle Green#00824B

Monochromatic variants

Monochromatic variants keep the same hue and saturation and only change lightness, which makes them dependable for UI scales and subtle layered designs.

#12001F#12001F

#3B0066#3B0066

#6400AD#6400AD

#8D00F5#8D00F5

#AD3DFF#AD3DFF

A “≈” before a name means the exact harmony color has no named match, so the link goes to the closest named color.

Tints and shades of Indigo

Lighter tints (mixed with white)

Darker shades (mixed with black)

Select any swatch to copy its HEX code. Build longer scales with the tints and shades tool.

Royal Purple#4B006E Deep Blue#040273 Navy#000080 Royal#0C1793 Dark Royal Blue#02066F Rebecca Purple#663399 Dark Blue#00008B Purple#800080

Where to use Indigo

Button, banner and badge backgrounds with white text (12.95:1 contrast)
Accents that need to stand out: call-to-action buttons, charts and illustrations
Premium-feeling accents and gradients
Illustrations and hero sections
Tags, badges and highlights
Creative and entertainment branding

Indigo appears in these curated palettes: Dark Violet (Dark Color Palettes).

Use Indigo in CSS

:root {
  --color-indigo: #4B0082;
}

.element {
  color: var(--color-indigo);
  background-color: #4B0082;
  border: 2px solid #4B0082;
}

Questions about Indigo

What is the HEX code for Indigo?

Indigo is #4B0082.

What is the RGB value of Indigo?

The RGB value of Indigo is 75, 0, 130: 75 red, 0 green and 130 blue on a 0–255 scale, written rgb(75, 0, 130) in CSS.

What is the HSL value of Indigo?

The HSL value of Indigo is 275°, 100%, 25% (hue, saturation, lightness), written hsl(275, 100%, 25%) in CSS.

What is the CMYK value of Indigo?

A standard conversion gives about C 42%, M 100%, Y 0%, K 49%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.

Is Indigo a light or dark color?

Indigo counts as a dark color: its HSL lightness is 25% and its relative luminance is 0.031. White text reads comfortably on it (12.95:1 contrast).

How does Indigo look with white text?

White text on Indigo has a contrast ratio of 12.95:1, rated Excellent. It meets WCAG AA for normal text.

How does Indigo look with black text?

Black text on Indigo has a contrast ratio of 1.62:1, rated Poor. It falls below the WCAG minimum for text.

What colors go well with Indigo?

Dark Grass Green is its complementary color, and Navy sits beside it as an analogous color. Lighter and darker variants of the same hue also work well for monochromatic palettes.

Where can Indigo be used?

It suits button, banner and badge backgrounds with white text (12.95:1 contrast); accents that need to stand out: call-to-action buttons, charts and illustrations; premium-feeling accents and gradients.

How do I use Indigo in CSS?

Use color: #4B0082; for text, background-color: #4B0082; for fills, or define a custom property such as --color-indigo: #4B0082; and reuse it with var(--color-indigo).

About this color page

CSS named color (W3C CSS Color Module). Values are calculated from the HEX code; color names are labels, not trademarks or standards unless stated. Screens render colors differently, so always check important colors on your own device. See the disclaimer.

Indigo Color Code: #4B0082