What color is #0A211B?

#0A211B is a very dark, moderate spring green, closest to the named color Swamp Thing. It belongs to the black family of colors.

What is the RGB value of #0A211B?

The RGB value is 10, 33, 27: 10 red, 33 green and 27 blue on a 0 to 255 scale.

What is the complementary color of #0A211B?

The complementary color is #210A10, found by rotating the hue 180° on the color wheel.

Is black or white text better on #0A211B?

White text. Black text has a contrast ratio of 1.25:1 and white text 16.85:1. WCAG asks for at least 4.5:1 for normal text.

#0A211B color

#0A211B rgb(10, 33, 27)

Shades of black

The hex color #0A211B is a very dark, moderate spring green.

In the RGB color model it is made of 3.9% red, 12.9% green and 10.6% blue (10, 33, 27).

Its hue angle is 164°, with 53% saturation and 8% lightness. For print, the CMYK equivalent is 70% cyan, 0% magenta, 18% yellow and 87% black.

The closest named color is Swamp Thing (#162825), a difference of 3.7 ΔE, a small difference.

White text is the more readable choice on this background (contrast 16.85:1).

#0A211B color codes

HEX	`#0A211B`
RGB	`rgb(10, 33, 27)`
RGB percent	`rgb(3.9%, 12.9%, 10.6%)`
HSL	`hsl(164, 53%, 8%)`
HSV / HSB	`hsv(164, 70%, 13%)`
CMYK	`cmyk(70%, 0%, 18%, 87%)`
CIE LAB	`lab(10.79, -11, 1.32)`
CIE LCH	`lch(10.79, 11.08, 173.14)`
CIE XYZ	`xyz(0.867, 1.231, 1.229)`
Decimal	`663835`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #0A211B, 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 #0A211B	Ratio	AA	AAA	AA large
Sample text	1.25:1	Fail	Fail	Fail
Sample text	16.85:1	Pass	Pass	Pass

#0A211B as text on	Ratio	AA	AAA	AA large
Sample text	16.85:1	Pass	Pass	Pass
Sample text	1.25:1	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 #0A211B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #0a211b; }
.text { color: #0a211b; }
.border { border: 2px solid #0a211b; }
.transparent { background-color: rgb(10 33 27 / 50%); }
.gradient { background: linear-gradient(to right, #0a211b, #0a1c21); }

Background

Text color

Border

Similar colors

Closest common color name: Onyx.

Questions

What color is #0A211B?: #0A211B is a very dark, moderate spring green, closest to the named color Swamp Thing. It belongs to the black family of colors.
What is the RGB value of #0A211B?: The RGB value is 10, 33, 27: 10 red, 33 green and 27 blue on a 0 to 255 scale.
What is the complementary color of #0A211B?: The complementary color is #210A10, found by rotating the hue 180° on the color wheel.
Is black or white text better on #0A211B?: White text. Black text has a contrast ratio of 1.25:1 and white text 16.85:1. WCAG asks for at least 4.5:1 for normal text.