#b21d08

Color #b21d08

A vivid, highly saturated dark red.

Closest named color Firebrick #b22222 · ΔE 11.36 Nearest Tailwind class red-700 #c10007 · ΔE 2.9

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Conversions

HEX

#b21d08

RGB

rgb(178, 29, 8)

HSL

hsl(7.4, 91.4%, 36.5%)

HSV / HSB

hsv(7.4, 95.5%, 69.8%)

CMYK

cmyk(0%, 83.7%, 95.5%, 30.2%)

LAB

lab(38.49, 56.7, 48.97)

LCH

lch(38.49, 74.92, 40.82)

OKLCH

oklch(49.2%, 0.1854, 31.05)

HWB

hwb(7.4, 3.1%, 30.2%)

Harmony colors

Complementary

#089db2

Analogous

#b20848

#b21d08

#b27208

Triadic

#b21d08

#08b21d

#1d08b2

Split-complementary

#b21d08

#08b272

#0848b2

Tetradic

#b21d08

#9db208

#089db2

#1d08b2

Square

#b21d08

#48b208

#089db2

#7208b2

Shades

Color #b21d08 mixed toward black.

#941807

#771305

#590e04

#3b0a03

#1e0501

Tints

Color #b21d08 mixed toward white.

#e6250a

#f64930

#f87664

#faa498

#fdd1cb

Tones

Color #b21d08 mixed toward gray.

#a42816

#963224

#883d33

#794841

#6b524f

Accessibility

Aa White text on this color

6.84:1

Aa Black text on this color

3.07:1

White text reads better on this background (6.84:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#8b8a0f · ΔE 46.4

Deuteranopia

#919810 · ΔE 51.3

Tritanopia

#ae1314 · ΔE 3.5

Achromatopsia

#5b5b5b · ΔE 28

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

Code

CSS

background-color: #b21d08;

Tailwind (arbitrary value)

bg-[#b21d08]

Related colors

Salmon #fa8072

Misty Rose #ffe4e1

Tomato #ff6347

Red #ff0000

Maroon #800000

Black #000000

Frequently asked questions

#b21d08 (#b21d08) is rgb(178, 29, 8) in RGB.

No, #b21d08 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 #b21d08, or check how it holds up for accessibility.

Generate a palette → Check contrast