What color is #637C81?

#637C81 is a grayish cyan, closest to the named color Catfish. It belongs to the gray family of colors.

What is the RGB value of #637C81?

The RGB value is 99, 124, 129: 99 red, 124 green and 129 blue on a 0 to 255 scale.

What is the complementary color of #637C81?

The complementary color is #816863, found by rotating the hue 180° on the color wheel.

Is black or white text better on #637C81?

Black text. Black text has a contrast ratio of 4.73:1 and white text 4.44:1. WCAG asks for at least 4.5:1 for normal text.

#637C81 color

#637C81 rgb(99, 124, 129)

Shades of gray

The hex color #637C81 is a grayish cyan.

In the RGB color model it is made of 38.8% red, 48.6% green and 50.6% blue (99, 124, 129).

Its hue angle is 190°, with 13% saturation and 45% lightness. For print, the CMYK equivalent is 23% cyan, 4% magenta, 0% yellow and 49% black.

The closest named color is Catfish (#657D82), a difference of 0.6 ΔE, which is barely visible.

Black text is the more readable choice on this background (contrast 4.73:1).

#637C81 color codes

HEX	`#637C81`
RGB	`rgb(99, 124, 129)`
RGB percent	`rgb(38.8%, 48.6%, 50.6%)`
HSL	`hsl(190, 13%, 45%)`
HSV / HSB	`hsv(190, 23%, 51%)`
CMYK	`cmyk(23%, 4%, 0%, 49%)`
CIE LAB	`lab(50.28, -7.81, -5.7)`
CIE LCH	`lch(50.28, 9.67, 216.16)`
CIE XYZ	`xyz(16.315, 18.652, 23.505)`
Decimal	`6519937`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #637C81, 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 #637C81	Ratio	AA	AAA	AA large
Sample text	4.73:1	Pass	Fail	Pass
Sample text	4.44:1	Fail	Fail	Pass

#637C81 as text on	Ratio	AA	AAA	AA large
Sample text	4.44:1	Fail	Fail	Pass
Sample text	4.73:1	Pass	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 #637C81 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #637c81; }
.text { color: #637c81; }
.border { border: 2px solid #637c81; }
.transparent { background-color: rgb(99 124 129 / 50%); }
.gradient { background: linear-gradient(to right, #637c81, #636d81); }

Background

Text color

Border

Similar colors

Closest common color name: Slate Gray.

Questions

What color is #637C81?: #637C81 is a grayish cyan, closest to the named color Catfish. It belongs to the gray family of colors.
What is the RGB value of #637C81?: The RGB value is 99, 124, 129: 99 red, 124 green and 129 blue on a 0 to 255 scale.
What is the complementary color of #637C81?: The complementary color is #816863, found by rotating the hue 180° on the color wheel.
Is black or white text better on #637C81?: Black text. Black text has a contrast ratio of 4.73:1 and white text 4.44:1. WCAG asks for at least 4.5:1 for normal text.