What color is #0037AB?

#0037AB is a dark, vivid blue, closest to the named color Blue Hour. It belongs to the blue family of colors.

What is the RGB value of #0037AB?

The RGB value is 0, 55, 171: 0 red, 55 green and 171 blue on a 0 to 255 scale.

What is the complementary color of #0037AB?

The complementary color is #AB7400, found by rotating the hue 180° on the color wheel.

Is black or white text better on #0037AB?

White text. Black text has a contrast ratio of 2.13:1 and white text 9.84:1. WCAG asks for at least 4.5:1 for normal text.

#0037AB color

#0037AB rgb(0, 55, 171)

Shades of blue

The hex color #0037AB is a dark, vivid blue.

In the RGB color model it is made of 0% red, 21.6% green and 67.1% blue (0, 55, 171).

Its hue angle is 221°, with 100% saturation and 34% lightness. For print, the CMYK equivalent is 100% cyan, 68% magenta, 0% yellow and 33% black.

The closest named color is Blue Hour (#0034AB), a difference of 0.9 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 9.84:1).

#0037AB color codes

HEX	`#0037AB`
RGB	`rgb(0, 55, 171)`
RGB percent	`rgb(0%, 21.6%, 67.1%)`
HSL	`hsl(221, 100%, 34%)`
HSV / HSB	`hsv(221, 100%, 67%)`
CMYK	`cmyk(100%, 68%, 0%, 33%)`
CIE LAB	`lab(28.57, 33.36, -65.38)`
CIE LCH	`lch(28.57, 73.4, 297.03)`
CIE XYZ	`xyz(8.714, 5.671, 39.156)`
Decimal	`14251`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #0037AB, 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 #0037AB	Ratio	AA	AAA	AA large
Sample text	2.13:1	Fail	Fail	Fail
Sample text	9.84:1	Pass	Pass	Pass

#0037AB as text on	Ratio	AA	AAA	AA large
Sample text	9.84:1	Pass	Pass	Pass
Sample text	2.13:1	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 #0037AB looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #0037ab; }
.text { color: #0037ab; }
.border { border: 2px solid #0037ab; }
.transparent { background-color: rgb(0 55 171 / 50%); }
.gradient { background: linear-gradient(to right, #0037ab, #1f00ab); }

Background

Text color

Border

Similar colors

Questions

What color is #0037AB?: #0037AB is a dark, vivid blue, closest to the named color Blue Hour. It belongs to the blue family of colors.
What is the RGB value of #0037AB?: The RGB value is 0, 55, 171: 0 red, 55 green and 171 blue on a 0 to 255 scale.
What is the complementary color of #0037AB?: The complementary color is #AB7400, found by rotating the hue 180° on the color wheel.
Is black or white text better on #0037AB?: White text. Black text has a contrast ratio of 2.13:1 and white text 9.84:1. WCAG asks for at least 4.5:1 for normal text.