What color is #373B57?

#373B57 is a dark, grayish blue, closest to the named color Mediaeval Blue. It belongs to the blue family of colors.

What is the RGB value of #373B57?

The RGB value is 55, 59, 87: 55 red, 59 green and 87 blue on a 0 to 255 scale.

What is the complementary color of #373B57?

The complementary color is #575337, found by rotating the hue 180° on the color wheel.

Is black or white text better on #373B57?

White text. Black text has a contrast ratio of 1.93:1 and white text 10.91:1. WCAG asks for at least 4.5:1 for normal text.

#373B57 color

#373B57 rgb(55, 59, 87)

Shades of blue

The hex color #373B57 is a dark, grayish blue.

In the RGB color model it is made of 21.6% red, 23.1% green and 34.1% blue (55, 59, 87).

Its hue angle is 233°, with 23% saturation and 28% lightness. For print, the CMYK equivalent is 37% cyan, 32% magenta, 0% yellow and 66% black.

The closest named color is Mediaeval Blue (#2E3858), a difference of 2.7 ΔE, a small difference.

White text is the more readable choice on this background (contrast 10.91:1).

#373B57 color codes

HEX	`#373B57`
RGB	`rgb(55, 59, 87)`
RGB percent	`rgb(21.6%, 23.1%, 34.1%)`
HSL	`hsl(233, 23%, 28%)`
HSV / HSB	`hsv(233, 37%, 34%)`
CMYK	`cmyk(37%, 32%, 0%, 66%)`
CIE LAB	`lab(25.65, 6.06, -17.37)`
CIE LCH	`lch(25.65, 18.4, 289.22)`
CIE XYZ	`xyz(4.859, 4.628, 9.652)`
Decimal	`3619671`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #373B57, 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 #373B57	Ratio	AA	AAA	AA large
Sample text	1.93:1	Fail	Fail	Fail
Sample text	10.91:1	Pass	Pass	Pass

#373B57 as text on	Ratio	AA	AAA	AA large
Sample text	10.91:1	Pass	Pass	Pass
Sample text	1.93:1	Fail	Fail	Fail

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 #373B57 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #373b57; }
.text { color: #373b57; }
.border { border: 2px solid #373b57; }
.transparent { background-color: rgb(55 59 87 / 50%); }
.gradient { background: linear-gradient(to right, #373b57, #433757); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #373B57?: #373B57 is a dark, grayish blue, closest to the named color Mediaeval Blue. It belongs to the blue family of colors.
What is the RGB value of #373B57?: The RGB value is 55, 59, 87: 55 red, 59 green and 87 blue on a 0 to 255 scale.
What is the complementary color of #373B57?: The complementary color is #575337, found by rotating the hue 180° on the color wheel.
Is black or white text better on #373B57?: White text. Black text has a contrast ratio of 1.93:1 and white text 10.91:1. WCAG asks for at least 4.5:1 for normal text.