What color is #636B78?

#636B78 is a grayish azure, closest to the named color Ashen Whisper. It belongs to the gray family of colors.

What is the RGB value of #636B78?

The RGB value is 99, 107, 120: 99 red, 107 green and 120 blue on a 0 to 255 scale.

What is the complementary color of #636B78?

The complementary color is #787063, found by rotating the hue 180° on the color wheel.

Is black or white text better on #636B78?

White text. Black text has a contrast ratio of 3.9:1 and white text 5.38:1. WCAG asks for at least 4.5:1 for normal text.

#636B78 color

#636B78 rgb(99, 107, 120)

Shades of gray

The hex color #636B78 is a grayish azure.

In the RGB color model it is made of 38.8% red, 42% green and 47.1% blue (99, 107, 120).

Its hue angle is 217°, with 10% saturation and 43% lightness. For print, the CMYK equivalent is 18% cyan, 11% magenta, 0% yellow and 53% black.

The closest named color is Ashen Whisper (#646B7A), a difference of 1.3 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 5.38:1).

#636B78 color codes

HEX	`#636B78`
RGB	`rgb(99, 107, 120)`
RGB percent	`rgb(38.8%, 42%, 47.1%)`
HSL	`hsl(217, 10%, 43%)`
HSV / HSB	`hsv(217, 17%, 47%)`
CMYK	`cmyk(18%, 11%, 0%, 53%)`
CIE LAB	`lab(44.98, -0.08, -8.26)`
CIE LCH	`lch(44.98, 8.26, 269.48)`
CIE XYZ	`xyz(13.793, 14.524, 19.842)`
Decimal	`6515576`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #636B78, 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 #636B78	Ratio	AA	AAA	AA large
Sample text	3.9:1	Fail	Fail	Pass
Sample text	5.38:1	Pass	Fail	Pass

#636B78 as text on	Ratio	AA	AAA	AA large
Sample text	5.38:1	Pass	Fail	Pass
Sample text	3.9:1	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 #636B78 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #636b78; }
.text { color: #636b78; }
.border { border: 2px solid #636b78; }
.transparent { background-color: rgb(99 107 120 / 50%); }
.gradient { background: linear-gradient(to right, #636b78, #666378); }

Background

Text color

Border

Similar colors

Closest common color name: Space Gray.

Questions

What color is #636B78?: #636B78 is a grayish azure, closest to the named color Ashen Whisper. It belongs to the gray family of colors.
What is the RGB value of #636B78?: The RGB value is 99, 107, 120: 99 red, 107 green and 120 blue on a 0 to 255 scale.
What is the complementary color of #636B78?: The complementary color is #787063, found by rotating the hue 180° on the color wheel.
Is black or white text better on #636B78?: White text. Black text has a contrast ratio of 3.9:1 and white text 5.38:1. WCAG asks for at least 4.5:1 for normal text.