What color is #637D7F?

#637D7F is a grayish cyan, closest to the named color North Atlantic. It belongs to the gray family of colors.

What is the RGB value of #637D7F?

The RGB value is 99, 125, 127: 99 red, 125 green and 127 blue on a 0 to 255 scale.

What is the complementary color of #637D7F?

The complementary color is #7F6563, found by rotating the hue 180° on the color wheel.

Is black or white text better on #637D7F?

Black text. Black text has a contrast ratio of 4.77:1 and white text 4.4:1. WCAG asks for at least 4.5:1 for normal text.

#637D7F color

#637D7F rgb(99, 125, 127)

Shades of gray

The hex color #637D7F is a grayish cyan.

In the RGB color model it is made of 38.8% red, 49% green and 49.8% blue (99, 125, 127).

Its hue angle is 184°, with 12% saturation and 44% lightness. For print, the CMYK equivalent is 22% cyan, 2% magenta, 0% yellow and 50% black.

The closest named color is North Atlantic (#5E7B7F), a difference of 1.5 ΔE, which is barely visible.

Black text is the more readable choice on this background (contrast 4.77:1).

#637D7F color codes

HEX	`#637D7F`
RGB	`rgb(99, 125, 127)`
RGB percent	`rgb(38.8%, 49%, 49.8%)`
HSL	`hsl(184, 12%, 44%)`
HSV / HSB	`hsv(184, 22%, 50%)`
CMYK	`cmyk(22%, 2%, 0%, 50%)`
CIE LAB	`lab(50.51, -8.85, -4.18)`
CIE LCH	`lch(50.51, 9.79, 205.28)`
CIE XYZ	`xyz(16.309, 18.852, 22.854)`
Decimal	`6520191`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #637D7F, 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 #637D7F	Ratio	AA	AAA	AA large
Sample text	4.77:1	Pass	Fail	Pass
Sample text	4.4:1	Fail	Fail	Pass

#637D7F as text on	Ratio	AA	AAA	AA large
Sample text	4.4:1	Fail	Fail	Pass
Sample text	4.77:1	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 #637D7F looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #637d7f; }
.text { color: #637d7f; }
.border { border: 2px solid #637d7f; }
.transparent { background-color: rgb(99 125 127 / 50%); }
.gradient { background: linear-gradient(to right, #637d7f, #636f7f); }

Background

Text color

Border

Similar colors

Closest common color name: Smoke.

Questions

What color is #637D7F?: #637D7F is a grayish cyan, closest to the named color North Atlantic. It belongs to the gray family of colors.
What is the RGB value of #637D7F?: The RGB value is 99, 125, 127: 99 red, 125 green and 127 blue on a 0 to 255 scale.
What is the complementary color of #637D7F?: The complementary color is #7F6563, found by rotating the hue 180° on the color wheel.
Is black or white text better on #637D7F?: Black text. Black text has a contrast ratio of 4.77:1 and white text 4.4:1. WCAG asks for at least 4.5:1 for normal text.