What color is #636C81?

#636C81 is a grayish blue, closest to the named color Ashen Whisper. It belongs to the gray family of colors.

What is the RGB value of #636C81?

The RGB value is 99, 108, 129: 99 red, 108 green and 129 blue on a 0 to 255 scale.

What is the complementary color of #636C81?

The complementary color is #817863, found by rotating the hue 180° on the color wheel.

Is black or white text better on #636C81?

White text. Black text has a contrast ratio of 3.99:1 and white text 5.26:1. WCAG asks for at least 4.5:1 for normal text.

#636C81 color

#636C81 rgb(99, 108, 129)

Shades of gray

The hex color #636C81 is a grayish blue.

In the RGB color model it is made of 38.8% red, 42.4% green and 50.6% blue (99, 108, 129).

Its hue angle is 222°, with 13% saturation and 45% lightness. For print, the CMYK equivalent is 23% cyan, 16% magenta, 0% yellow and 49% black.

The closest named color is Ashen Whisper (#646B7A), a difference of 2.5 ΔE, a small difference.

White text is the more readable choice on this background (contrast 5.26:1).

#636C81 color codes

HEX	`#636C81`
RGB	`rgb(99, 108, 129)`
RGB percent	`rgb(38.8%, 42.4%, 50.6%)`
HSL	`hsl(222, 13%, 45%)`
HSV / HSB	`hsv(222, 23%, 51%)`
CMYK	`cmyk(23%, 16%, 0%, 49%)`
CIE LAB	`lab(45.58, 1.54, -12.74)`
CIE LCH	`lch(45.58, 12.84, 276.87)`
CIE XYZ	`xyz(14.47, 14.962, 22.89)`
Decimal	`6515841`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #636C81, 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 #636C81	Ratio	AA	AAA	AA large
Sample text	3.99:1	Fail	Fail	Pass
Sample text	5.26:1	Pass	Fail	Pass

#636C81 as text on	Ratio	AA	AAA	AA large
Sample text	5.26:1	Pass	Fail	Pass
Sample text	3.99:1	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 #636C81 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #636c81; }
.text { color: #636c81; }
.border { border: 2px solid #636c81; }
.transparent { background-color: rgb(99 108 129 / 50%); }
.gradient { background: linear-gradient(to right, #636c81, #696381); }

Background

Text color

Border

Similar colors

Closest common color name: Space Gray.

Questions

What color is #636C81?: #636C81 is a grayish blue, closest to the named color Ashen Whisper. It belongs to the gray family of colors.
What is the RGB value of #636C81?: The RGB value is 99, 108, 129: 99 red, 108 green and 129 blue on a 0 to 255 scale.
What is the complementary color of #636C81?: The complementary color is #817863, found by rotating the hue 180° on the color wheel.
Is black or white text better on #636C81?: White text. Black text has a contrast ratio of 3.99:1 and white text 5.26:1. WCAG asks for at least 4.5:1 for normal text.