What color is #637BA0?

#637BA0 is a grayish azure, closest to the named color Montreux Blue. It belongs to the blue family of colors.

What is the RGB value of #637BA0?

The RGB value is 99, 123, 160: 99 red, 123 green and 160 blue on a 0 to 255 scale.

What is the complementary color of #637BA0?

The complementary color is #A08863, found by rotating the hue 180° on the color wheel.

Is black or white text better on #637BA0?

Black text. Black text has a contrast ratio of 4.87:1 and white text 4.31:1. WCAG asks for at least 4.5:1 for normal text.

#637BA0 color

#637BA0 rgb(99, 123, 160)

Shades of blue

The hex color #637BA0 is a grayish azure.

In the RGB color model it is made of 38.8% red, 48.2% green and 62.7% blue (99, 123, 160).

Its hue angle is 216°, with 24% saturation and 51% lightness. For print, the CMYK equivalent is 38% cyan, 23% magenta, 0% yellow and 37% black.

The closest named color is Montreux Blue (#5879A2), a difference of 2.6 ΔE, a small difference.

Black text is the more readable choice on this background (contrast 4.87:1).

#637BA0 color codes

HEX	`#637BA0`
RGB	`rgb(99, 123, 160)`
RGB percent	`rgb(38.8%, 48.2%, 62.7%)`
HSL	`hsl(216, 24%, 51%)`
HSV / HSB	`hsv(216, 38%, 63%)`
CMYK	`cmyk(38%, 23%, 0%, 37%)`
CIE LAB	`lab(51.1, 0.91, -22.62)`
CIE LCH	`lch(51.1, 22.63, 272.31)`
CIE XYZ	`xyz(18.572, 19.356, 36.008)`
Decimal	`6519712`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #637BA0, 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 #637BA0	Ratio	AA	AAA	AA large
Sample text	4.87:1	Pass	Fail	Pass
Sample text	4.31:1	Fail	Fail	Pass

#637BA0 as text on	Ratio	AA	AAA	AA large
Sample text	4.31:1	Fail	Fail	Pass
Sample text	4.87:1	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 #637BA0 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #637ba0; }
.text { color: #637ba0; }
.border { border: 2px solid #637ba0; }
.transparent { background-color: rgb(99 123 160 / 50%); }
.gradient { background: linear-gradient(to right, #637ba0, #6a63a0); }

Background

Text color

Border

Similar colors

Closest common color name: Slate Gray.

Questions

What color is #637BA0?: #637BA0 is a grayish azure, closest to the named color Montreux Blue. It belongs to the blue family of colors.
What is the RGB value of #637BA0?: The RGB value is 99, 123, 160: 99 red, 123 green and 160 blue on a 0 to 255 scale.
What is the complementary color of #637BA0?: The complementary color is #A08863, found by rotating the hue 180° on the color wheel.
Is black or white text better on #637BA0?: Black text. Black text has a contrast ratio of 4.87:1 and white text 4.31:1. WCAG asks for at least 4.5:1 for normal text.