#B23931#B23931

#B23931 is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.0% C 0.158 H 27.7°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#B23931
RGB	rgb(178, 57, 49)
HSL	hsl(4, 57%, 45%)
HSV	hsv(4, 72%, 70%)
CMYK	cmyk(0%, 68%, 72.5%, 30.2%)
CIE-LAB	lab(42.18, 48.49, 32.37)
CIE-LCH	lch(42.18, 58.31, 33.73°)
OKLab	oklab(52.02% 0.1402 0.0736)
OKLCH	oklch(52.02% 0.158 27.7)
XYZ	xyz(20.3798, 12.6160, 4.2671)
Luminance	0.1261 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23931 #31AAB2

analogous

#B2316A #B23931 #B27A31

triadic

#B23931 #31B239 #3931B2

tetradic

#B23931 #6AB231 #31AAB2 #7A31B2

square

#B23931 #6AB231 #31AAB2 #7A31B2

split-complementary

#B23931 #31B27A #316AB2

monochromatic

#521A17 #822A24 #B23931 #CF5951 #DC8781

Accessibility & contrast

On white

5.96

#B23931 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#B23931 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23931

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23931	#FFFFFF	#000000	##FFFFFF
##B23931	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B532F

Deuteranopia (green-blind)

#796D2D

Tritanopia (blue-blind)

#C41538

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b23931;
/* rgb */ color: rgb(178, 57, 49);
/* oklch */ color: oklch(52.0% 0.158 27.7);

Tailwind

colors: {
  custom: {
    50: '#d17669',
    500: '#b23931',
    950: '#000000',
  },
}

SCSS

$custom: #b23931;
$custom-light: #d17669;
$custom-dark: #000000;

JSON

{
  "hex": "#b23931",
  "rgb": {
    "r": 178,
    "g": 57,
    "b": 49
  },
  "hsl": {
    "h": 3.721,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.52015,
    "c": 0.15833,
    "h": 27.7
  },
  "luminance": 0.12613
}

Semantic roles & 50–950 ramp

primary

#B23931

secondary

#79C1C5

accent

#D7E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B23931

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →