What color is #21231D?

#21231D is a very dark, grayish yellow-green, closest to the named color Underworld. It belongs to the black family of colors.

What is the RGB value of #21231D?

The RGB value is 33, 35, 29: 33 red, 35 green and 29 blue on a 0 to 255 scale.

What is the complementary color of #21231D?

The complementary color is #1F1D23, found by rotating the hue 180° on the color wheel.

Is black or white text better on #21231D?

White text. Black text has a contrast ratio of 1.32:1 and white text 15.88:1. WCAG asks for at least 4.5:1 for normal text.

#21231D color

#21231D rgb(33, 35, 29)

Shades of black

The hex color #21231D is a very dark, grayish yellow-green.

In the RGB color model it is made of 12.9% red, 13.7% green and 11.4% blue (33, 35, 29).

Its hue angle is 80°, with 9% saturation and 13% lightness. For print, the CMYK equivalent is 6% cyan, 0% magenta, 17% yellow and 86% black.

The closest named color is Underworld (#1E231C), a difference of 2.1 ΔE, a small difference.

White text is the more readable choice on this background (contrast 15.88:1).

#21231D color codes

HEX	`#21231D`
RGB	`rgb(33, 35, 29)`
RGB percent	`rgb(12.9%, 13.7%, 11.4%)`
HSL	`hsl(80, 9%, 13%)`
HSV / HSB	`hsv(80, 17%, 14%)`
CMYK	`cmyk(6%, 0%, 17%, 86%)`
CIE LAB	`lab(13.32, -2.35, 3.72)`
CIE LCH	`lch(13.32, 4.4, 122.34)`
CIE XYZ	`xyz(1.45, 1.614, 1.397)`
Decimal	`2171677`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #21231D, based on their position on the color wheel.

Complementary

The color opposite on the color wheel (180°). Strongest contrast.

Analogous

Neighbors 30° either side. Calm, natural combinations.

Split complementary

The two colors next to the complement (150° and 210°).

Triadic

Three colors evenly spaced, 120° apart.

Tetradic (square)

Four colors 90° apart.

Shades, tints and tones

Shades (darker, mixed with black)

Tints (lighter, mixed with white)

Tones (mixed with gray)

Contrast and accessibility

Text on #21231D	Ratio	AA	AAA	AA large
Sample text	1.32:1	Fail	Fail	Fail
Sample text	15.88:1	Pass	Pass	Pass

#21231D as text on	Ratio	AA	AAA	AA large
Sample text	15.88:1	Pass	Pass	Pass
Sample text	1.32:1	Fail	Fail	Fail

WCAG 2 asks for 4.5:1 for normal text (AA), 7:1 for AAA, and 3:1 for large text. Check other pairs.

Color blindness simulation

How #21231D looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #21231d; }
.text { color: #21231d; }
.border { border: 2px solid #21231d; }
.transparent { background-color: rgb(33 35 29 / 50%); }
.gradient { background: linear-gradient(to right, #21231d, #1e231d); }

Background

Text color

Border

Similar colors

Closest common color name: Onyx.

Questions

What color is #21231D?: #21231D is a very dark, grayish yellow-green, closest to the named color Underworld. It belongs to the black family of colors.
What is the RGB value of #21231D?: The RGB value is 33, 35, 29: 33 red, 35 green and 29 blue on a 0 to 255 scale.
What is the complementary color of #21231D?: The complementary color is #1F1D23, found by rotating the hue 180° on the color wheel.
Is black or white text better on #21231D?: White text. Black text has a contrast ratio of 1.32:1 and white text 15.88:1. WCAG asks for at least 4.5:1 for normal text.