#B12B2B

Accessibility

6.46:1

Vs white / black

6.46:1 · 3.25:1

Sources

Library color

Codes

Formats

HEX

#b12b2b

RGB

rgb(177, 43, 43)

RGBA

rgba(177, 43, 43, 1)

HSL

hsl(0, 61%, 43%)

HSLA

hsla(0, 61%, 43%, 1)

HSV

hsv(0, 76%, 69%)

LAB

lab(40% 53.17 33.37)

LCH

lch(40% 62.77 32.11)

OKLAB

oklab(0.5033 0.1537 0.0745)

OKLCH

oklch(0.5033 0.1708 25.86)

XYZ

xyz(19.43, 11.25, 3.43)

CMYK

cmyk(0%, 76%, 76%, 31%)

CSS

color: #b12b2b;

CSS variable

--color-b12b2b: #b12b2b;

SCSS

$color-b12b2b: #b12b2b;

JavaScript

const color = "#b12b2b";

TypeScript

const color: string = "#b12b2b";

React

style={{ backgroundColor: "#b12b2b" }}

JSON

{ "hex": "#b12b2b", "rgb": { "r": 177, "g": 43, "b": 43 }, "oklch": "oklch(0.5033 0.1708 25.86)" }

Export

Developer code

css

:root {
  --#b12b2b-1: #b12b2b;
}

Design systems

Nearest official tokens

An arbitrary HEX is not an official Tailwind, Material, or Bootstrap color. Distance is CIEDE2000.

Nearest Tailwind color

red-700

Noticeably different · ΔE 3.31 · #B91C1C

Nearest CSS named color

FireBrick

Similar · ΔE 1.84 · #B22222

Nearest Material color

red-900

Noticeably different · ΔE 3.16 · #B71C1C

Nearest Bootstrap color

danger

Very different · ΔE 10.17 · #DC3545

OKLCH

Perceptual 50–950 scale

Generated in OKLCH from this hex. Not an official Tailwind scale unless the hex itself is a Tailwind token.

50ffdbd1 100ffcbc1 200ffb1a7 300ff948a 400fa7067 500da534d 600b8443f 700963330 800752421 900551514 950390204

Palette

Tints & shades

Full scale from light tints through the base color into deep shades

f9eded f2dcdc eccaca e5b8b8 dfa7a7 d89595 d28383 cb7272 c56060 be4e4e b83d3d b12b2b a22727 942424 852020 761d1d 671919 591616 4a1212 3b0e0e 2c0b0b 1d0707 0f0404

Palette

Tints

Mixed toward white — soft backgrounds and highlights

f9eded f2dcdc eccaca e5b8b8 dfa7a7 d89595 d28383 cb7272 c56060 be4e4e b83d3d

Palette

Shades

Mixed toward black — depth, text, and emphasis

a22727 942424 852020 761d1d 671919 591616 4a1212 3b0e0e 2c0b0b 1d0707 0f0404

Palette

Tones

Mixed toward neutral grey — muted UI surfaces

ad3232 a93939 a54040 a14747 9d4e4e 995656 945d5d 906464 8c6b6b 887272 847979

Harmony

Complementary

Opposite on the color wheel for contrast

#B12B2BStop 1 #2BB1B1Stop 2

Harmony

Analogous

Neighbors that sit comfortably together

#B12B6EStop 1 #B12B2BStop 2 #B16E2BStop 3

Harmony

Triadic

Evenly spaced triad for vibrant sets

#B12B2BStop 1 #2BB12BStop 2 #2B2BB1Stop 3

Harmony

Split complementary

Base plus two accents beside the complement

#B12B2BStop 1 #2BB16EStop 2 #2B6EB1Stop 3

Harmony

Monochromatic

Same hue, varied lightness and saturation

#521414Stop 1 #902323Stop 2 #CD3232Stop 3 #DC6F6FStop 4 #EBADADStop 5

Using this color

Where #b12b2b works

#B12B2B (#b12b2b) sits in the red family at about 0° hue, 61% saturation, and 43% lightness. Contrast is 6.46:1 on white and 3.25:1 on black, so white labels read more clearly on the swatch itself. Nearest Tailwind token: red-700 (approximation unless the hex is an official scale stop).

Sensible jobs for this swatch

primary buttons and key accents
text or icons on a white canvas

On a black or near-black UI, #b12b2b is 3.25:1. Prefer it as a fill, border, or large heading rather than 16px copy.

Family context: Energy, urgency, passion, and excitement. Often used for CTAs, alerts, and brands that want attention. Common uses still include buttons, charts, and accents in the Red range — always verify the pair for this exact hex in the contrast checker.

Similar & related colors

Nearby colors from the library by perceptual distance

FireBrick#B22222 Brown#A52A2A Material You Error#B3261E Material Red 900#B71C1C Tailwind red 700#B91C1C Material Red 800#C62828 Spectrum #B42F1D#B42F1D Spectrum #B84032#B84032 Pomegranate#C0392B Spectrum #96342C#96342C Web Safe #993333#993333 Web Safe #CC0033#CC0033