What color is #0051BB?

#0051BB is a dark, vivid azure, closest to the named color Sapphire. It belongs to the blue family of colors.

What is the RGB value of #0051BB?

The RGB value is 0, 81, 187: 0 red, 81 green and 187 blue on a 0 to 255 scale.

What is the complementary color of #0051BB?

The complementary color is #BB6A00, found by rotating the hue 180° on the color wheel.

Is black or white text better on #0051BB?

White text. Black text has a contrast ratio of 2.89:1 and white text 7.26:1. WCAG asks for at least 4.5:1 for normal text.

#0051BB color

#0051BB rgb(0, 81, 187)

Shades of blue

The hex color #0051BB is a dark, vivid azure.

In the RGB color model it is made of 0% red, 31.8% green and 73.3% blue (0, 81, 187).

Its hue angle is 214°, with 100% saturation and 37% lightness. For print, the CMYK equivalent is 100% cyan, 57% magenta, 0% yellow and 27% black.

The closest named color is Sapphire (#0F52BA), a difference of 0.4 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 7.26:1).

#0051BB color codes

HEX	`#0051BB`
RGB	`rgb(0, 81, 187)`
RGB percent	`rgb(0%, 31.8%, 73.3%)`
HSL	`hsl(214, 100%, 37%)`
HSV / HSB	`hsv(214, 100%, 73%)`
CMYK	`cmyk(100%, 57%, 0%, 27%)`
CIE LAB	`lab(36.88, 22.28, -61.27)`
CIE LCH	`lch(36.88, 65.19, 289.99)`
CIE XYZ	`xyz(11.909, 9.471, 48.204)`
Decimal	`20923`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #0051BB, 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 #0051BB	Ratio	AA	AAA	AA large
Sample text	2.89:1	Fail	Fail	Fail
Sample text	7.26:1	Pass	Pass	Pass

#0051BB as text on	Ratio	AA	AAA	AA large
Sample text	7.26:1	Pass	Pass	Pass
Sample text	2.89:1	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 #0051BB looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #0051bb; }
.text { color: #0051bb; }
.border { border: 2px solid #0051bb; }
.transparent { background-color: rgb(0 81 187 / 50%); }
.gradient { background: linear-gradient(to right, #0051bb, #0c00bb); }

Background

Text color

Border

Similar colors

Questions

What color is #0051BB?: #0051BB is a dark, vivid azure, closest to the named color Sapphire. It belongs to the blue family of colors.
What is the RGB value of #0051BB?: The RGB value is 0, 81, 187: 0 red, 81 green and 187 blue on a 0 to 255 scale.
What is the complementary color of #0051BB?: The complementary color is #BB6A00, found by rotating the hue 180° on the color wheel.
Is black or white text better on #0051BB?: White text. Black text has a contrast ratio of 2.89:1 and white text 7.26:1. WCAG asks for at least 4.5:1 for normal text.