What color is #181B15?

#181B15 is a very dark, grayish green, closest to the named color Underworld. It belongs to the black family of colors.

What is the RGB value of #181B15?

The RGB value is 24, 27, 21: 24 red, 27 green and 21 blue on a 0 to 255 scale.

What is the complementary color of #181B15?

The complementary color is #18151B, found by rotating the hue 180° on the color wheel.

Is black or white text better on #181B15?

White text. Black text has a contrast ratio of 1.21:1 and white text 17.41:1. WCAG asks for at least 4.5:1 for normal text.

#181B15 color

#181B15 rgb(24, 27, 21)

Shades of black

The hex color #181B15 is a very dark, grayish green.

In the RGB color model it is made of 9.4% red, 10.6% green and 8.2% blue (24, 27, 21).

Its hue angle is 90°, with 13% saturation and 9% lightness. For print, the CMYK equivalent is 11% cyan, 0% magenta, 22% yellow and 89% black.

The closest named color is Underworld (#1E231C), a difference of 2.7 ΔE, a small difference.

White text is the more readable choice on this background (contrast 17.41:1).

#181B15 color codes

HEX	`#181B15`
RGB	`rgb(24, 27, 21)`
RGB percent	`rgb(9.4%, 10.6%, 8.2%)`
HSL	`hsl(90, 13%, 9%)`
HSV / HSB	`hsv(90, 22%, 11%)`
CMYK	`cmyk(11%, 0%, 22%, 89%)`
CIE LAB	`lab(9.26, -2.93, 3.65)`
CIE LCH	`lch(9.26, 4.68, 128.79)`
CIE XYZ	`xyz(0.904, 1.032, 0.861)`
Decimal	`1579797`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #181B15, 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 #181B15	Ratio	AA	AAA	AA large
Sample text	1.21:1	Fail	Fail	Fail
Sample text	17.41:1	Pass	Pass	Pass

#181B15 as text on	Ratio	AA	AAA	AA large
Sample text	17.41:1	Pass	Pass	Pass
Sample text	1.21:1	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 #181B15 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #181b15; }
.text { color: #181b15; }
.border { border: 2px solid #181b15; }
.transparent { background-color: rgb(24 27 21 / 50%); }
.gradient { background: linear-gradient(to right, #181b15, #151b15); }

Background

Text color

Border

Similar colors

Closest common color name: Off Black.

Questions

What color is #181B15?: #181B15 is a very dark, grayish green, closest to the named color Underworld. It belongs to the black family of colors.
What is the RGB value of #181B15?: The RGB value is 24, 27, 21: 24 red, 27 green and 21 blue on a 0 to 255 scale.
What is the complementary color of #181B15?: The complementary color is #18151B, found by rotating the hue 180° on the color wheel.
Is black or white text better on #181B15?: White text. Black text has a contrast ratio of 1.21:1 and white text 17.41:1. WCAG asks for at least 4.5:1 for normal text.