What color is #B51819?

#B51819 is a moderate red, closest to the named color Siren Scarlet. It belongs to the red family of colors.

What is the RGB value of #B51819?

The RGB value is 181, 24, 25: 181 red, 24 green and 25 blue on a 0 to 255 scale.

What is the complementary color of #B51819?

The complementary color is #18B5B4, found by rotating the hue 180° on the color wheel.

Is black or white text better on #B51819?

White text. Black text has a contrast ratio of 3.11:1 and white text 6.75:1. WCAG asks for at least 4.5:1 for normal text.

#B51819 color

#B51819 rgb(181, 24, 25)

Shades of red

The hex color #B51819 is a moderate red.

In the RGB color model it is made of 71% red, 9.4% green and 9.8% blue (181, 24, 25).

Its hue angle is 360°, with 77% saturation and 40% lightness. For print, the CMYK equivalent is 0% cyan, 87% magenta, 86% yellow and 29% black.

The closest named color is Siren Scarlet (#B21D1D), a difference of 0.9 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 6.75:1).

#B51819 color codes

HEX	`#B51819`
RGB	`rgb(181, 24, 25)`
RGB percent	`rgb(71%, 9.4%, 9.8%)`
HSL	`hsl(360, 77%, 40%)`
HSV / HSB	`hsv(360, 87%, 71%)`
CMYK	`cmyk(0%, 87%, 86%, 29%)`
CIE LAB	`lab(38.81, 58.94, 42.39)`
CIE LCH	`lch(38.81, 72.6, 35.73)`
CIE XYZ	`xyz(19.561, 10.551, 1.926)`
Decimal	`11868185`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #B51819, 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 #B51819	Ratio	AA	AAA	AA large
Sample text	3.11:1	Fail	Fail	Pass
Sample text	6.75:1	Pass	Fail	Pass

#B51819 as text on	Ratio	AA	AAA	AA large
Sample text	6.75:1	Pass	Fail	Pass
Sample text	3.11:1	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 #B51819 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #b51819; }
.text { color: #b51819; }
.border { border: 2px solid #b51819; }
.transparent { background-color: rgb(181 24 25 / 50%); }
.gradient { background: linear-gradient(to right, #b51819, #b56518); }

Background

Text color

Border

Similar colors

Questions

What color is #B51819?: #B51819 is a moderate red, closest to the named color Siren Scarlet. It belongs to the red family of colors.
What is the RGB value of #B51819?: The RGB value is 181, 24, 25: 181 red, 24 green and 25 blue on a 0 to 255 scale.
What is the complementary color of #B51819?: The complementary color is #18B5B4, found by rotating the hue 180° on the color wheel.
Is black or white text better on #B51819?: White text. Black text has a contrast ratio of 3.11:1 and white text 6.75:1. WCAG asks for at least 4.5:1 for normal text.