#b40021

Color #b40021

A vivid, highly saturated dark red.

Closest named color Firebrick #b22222 · ΔE 6.55 Nearest Tailwind class red-800 #9f0712 · ΔE 4.9

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#b40021

RGB

rgb(180, 0, 33)

HSL

hsl(349, 100%, 35.3%)

HSV / HSB

hsv(349, 100%, 70.6%)

CMYK

cmyk(0%, 100%, 81.7%, 29.4%)

LAB

lab(37.51, 62.21, 36.75)

LCH

lch(37.51, 72.25, 30.57)

OKLCH

oklch(48.6%, 0.1962, 23.59)

HWB

hwb(349, 0%, 29.4%)

Harmony colors

Complementary

#00b493

Analogous

#b4007b

#b40021

#b43900

Triadic

#b40021

#21b400

#0021b4

Split-complementary

#b40021

#00b439

#007bb4

Tetradic

#b40021

#b49300

#00b493

#0021b4

Square

#b40021

#7bb400

#00b493

#3900b4

Shades

Color #b40021 mixed toward black.

#96001c

#780016

#5a0011

#3c000b

#1e0006

Tints

Color #b40021 mixed toward white.

#eb002b

#ff234b

#ff5a78

#ff91a5

#ffc8d2

Tones

Color #b40021 mixed toward gray.

#a50f2b

#961e34

#872d3e

#783c47

#694b51

Accessibility

Aa White text on this color

7.09:1

Aa Black text on this color

2.96:1

White text reads better on this background (7.09:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#8b8a1c · ΔE 51.1

Deuteranopia

#91991b · ΔE 56.7

Tritanopia

#b01716 · ΔE 4

Achromatopsia

#585858 · ΔE 27.7

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

Code

CSS

background-color: #b40021;

Tailwind (arbitrary value)

bg-[#b40021]

Related colors

Pink #ffc0cb

Crimson #dc143c

Light Pink #ffb6c1

Pale Violet Red #db7093

Lavender Blush #fff0f5

Hot Pink #ff69b4

Frequently asked questions

#b40021 (#b40021) is rgb(180, 0, 33) in RGB.

No, #b40021 is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

Colors

HEX to RGB Converter

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

Try it → Accessibility

Contrast Checker

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

Try it → Generators

Palette Generator

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

Try it →

Build something with this color

Generate a full palette from #b40021, or check how it holds up for accessibility.

Generate a palette → Check contrast