What color is #21383B?

#21383B is a very dark, desaturated cyan, closest to the named color Royal Neptune. It belongs to the gray family of colors.

What is the RGB value of #21383B?

The RGB value is 33, 56, 59: 33 red, 56 green and 59 blue on a 0 to 255 scale.

What is the complementary color of #21383B?

The complementary color is #3B2421, found by rotating the hue 180° on the color wheel.

Is black or white text better on #21383B?

White text. Black text has a contrast ratio of 1.69:1 and white text 12.4:1. WCAG asks for at least 4.5:1 for normal text.

#21383B color

#21383B rgb(33, 56, 59)

Shades of gray

The hex color #21383B is a very dark, desaturated cyan.

In the RGB color model it is made of 12.9% red, 22% green and 23.1% blue (33, 56, 59).

Its hue angle is 187°, with 28% saturation and 18% lightness. For print, the CMYK equivalent is 44% cyan, 5% magenta, 0% yellow and 77% black.

The closest named color is Royal Neptune (#1C3B42), a difference of 2.5 ΔE, a small difference.

White text is the more readable choice on this background (contrast 12.4:1).

#21383B color codes

HEX	`#21383B`
RGB	`rgb(33, 56, 59)`
RGB percent	`rgb(12.9%, 22%, 23.1%)`
HSL	`hsl(187, 28%, 18%)`
HSV / HSB	`hsv(187, 44%, 23%)`
CMYK	`cmyk(44%, 5%, 0%, 77%)`
CIE LAB	`lab(21.83, -8.06, -4.73)`
CIE LCH	`lch(21.83, 9.34, 210.38)`
CIE XYZ	`xyz(2.831, 3.467, 4.657)`
Decimal	`2177083`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #21383B, 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 #21383B	Ratio	AA	AAA	AA large
Sample text	1.69:1	Fail	Fail	Fail
Sample text	12.4:1	Pass	Pass	Pass

#21383B as text on	Ratio	AA	AAA	AA large
Sample text	12.4:1	Pass	Pass	Pass
Sample text	1.69:1	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 #21383B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #21383b; }
.text { color: #21383b; }
.border { border: 2px solid #21383b; }
.transparent { background-color: rgb(33 56 59 / 50%); }
.gradient { background: linear-gradient(to right, #21383b, #212b3b); }

Background

Text color

Border

Similar colors

Closest common color name: Gunmetal.

Questions

What color is #21383B?: #21383B is a very dark, desaturated cyan, closest to the named color Royal Neptune. It belongs to the gray family of colors.
What is the RGB value of #21383B?: The RGB value is 33, 56, 59: 33 red, 56 green and 59 blue on a 0 to 255 scale.
What is the complementary color of #21383B?: The complementary color is #3B2421, found by rotating the hue 180° on the color wheel.
Is black or white text better on #21383B?: White text. Black text has a contrast ratio of 1.69:1 and white text 12.4:1. WCAG asks for at least 4.5:1 for normal text.