What color is #51636B?

#51636B is a dark, grayish azure, closest to the named color Silent Night. It belongs to the gray family of colors.

What is the RGB value of #51636B?

The RGB value is 81, 99, 107: 81 red, 99 green and 107 blue on a 0 to 255 scale.

What is the complementary color of #51636B?

The complementary color is #6B5951, found by rotating the hue 180° on the color wheel.

Is black or white text better on #51636B?

White text. Black text has a contrast ratio of 3.35:1 and white text 6.27:1. WCAG asks for at least 4.5:1 for normal text.

#51636B color

#51636B rgb(81, 99, 107)

Shades of gray

The hex color #51636B is a dark, grayish azure.

In the RGB color model it is made of 31.8% red, 38.8% green and 42% blue (81, 99, 107).

Its hue angle is 198°, with 14% saturation and 37% lightness. For print, the CMYK equivalent is 24% cyan, 7% magenta, 0% yellow and 58% black.

The closest named color is Silent Night (#526771), a difference of 1.7 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 6.27:1).

#51636B color codes

HEX	`#51636B`
RGB	`rgb(81, 99, 107)`
RGB percent	`rgb(31.8%, 38.8%, 42%)`
HSL	`hsl(198, 14%, 37%)`
HSV / HSB	`hsv(198, 24%, 42%)`
CMYK	`cmyk(24%, 7%, 0%, 58%)`
CIE LAB	`lab(40.79, -4.81, -6.78)`
CIE LCH	`lch(40.79, 8.31, 234.64)`
CIE XYZ	`xyz(10.508, 11.734, 15.618)`
Decimal	`5333867`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #51636B, 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 #51636B	Ratio	AA	AAA	AA large
Sample text	3.35:1	Fail	Fail	Pass
Sample text	6.27:1	Pass	Fail	Pass

#51636B as text on	Ratio	AA	AAA	AA large
Sample text	6.27:1	Pass	Fail	Pass
Sample text	3.35:1	Fail	Fail	Pass

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 #51636B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #51636b; }
.text { color: #51636b; }
.border { border: 2px solid #51636b; }
.transparent { background-color: rgb(81 99 107 / 50%); }
.gradient { background: linear-gradient(to right, #51636b, #51566b); }

Background

Text color

Border

Similar colors

Closest common color name: Dim Gray.

Questions

What color is #51636B?: #51636B is a dark, grayish azure, closest to the named color Silent Night. It belongs to the gray family of colors.
What is the RGB value of #51636B?: The RGB value is 81, 99, 107: 81 red, 99 green and 107 blue on a 0 to 255 scale.
What is the complementary color of #51636B?: The complementary color is #6B5951, found by rotating the hue 180° on the color wheel.
Is black or white text better on #51636B?: White text. Black text has a contrast ratio of 3.35:1 and white text 6.27:1. WCAG asks for at least 4.5:1 for normal text.