#b51e08

Color #b51e08

A vivid, highly saturated dark red.

Closest named color Firebrick #b22222 · ΔE 12.13 Nearest Tailwind class red-700 #c10007 · ΔE 2.5

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Conversions

HEX

#b51e08

RGB

rgb(181, 30, 8)

HSL

hsl(7.6, 91.5%, 37.1%)

HSV / HSB

hsv(7.6, 95.6%, 71%)

CMYK

cmyk(0%, 83.4%, 95.6%, 29%)

LAB

lab(39.2, 57.32, 49.7)

LCH

lch(39.2, 75.87, 40.93)

OKLCH

oklch(49.8%, 0.1875, 31.15)

HWB

hwb(7.6, 3.1%, 29%)

Harmony colors

Complementary

#089fb5

Analogous

#b50849

#b51e08

#b57508

Triadic

#b51e08

#08b51e

#1e08b5

Split-complementary

#b51e08

#08b575

#0849b5

Tetradic

#b51e08

#9fb508

#089fb5

#1e08b5

Square

#b51e08

#49b508

#089fb5

#7508b5

Shades

Color #b51e08 mixed toward black.

#971907

#791405

#5b0f04

#3c0a03

#1e0501

Tints

Color #b51e08 mixed toward white.

#e8260a

#f64b32

#f87865

#faa599

#fdd2cc

Tones

Color #b51e08 mixed toward gray.

#a72916

#983425

#8a3e33

#7b4942

#6d5450

Accessibility

Aa White text on this color

6.66:1

Aa Black text on this color

3.15:1

White text reads better on this background (6.66:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#8d8c10 · ΔE 46.7

Deuteranopia

#939b11 · ΔE 52

Tritanopia

#b11415 · ΔE 3.6

Achromatopsia

#5c5c5c · ΔE 28.1

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #b51e08;

Tailwind (arbitrary value)

bg-[#b51e08]

Related colors

Salmon #fa8072

Tomato #ff6347

Misty Rose #ffe4e1

Dark Salmon #e9967a

Red #ff0000

Maroon #800000

Frequently asked questions

#b51e08 (#b51e08) is rgb(181, 30, 8) in RGB.

No, #b51e08 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #b51e08, or check how it holds up for accessibility.

Generate a palette → Check contrast