#B23037#B23037

#B23037 is a mid, vivid red. Relative luminance 0.119; OKLCH L 51.2% C 0.166 H 22.6°. Best body text is #FFFFFF at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#B23037
RGB	rgb(178, 48, 55)
HSL	hsl(357, 58%, 44%)
HSV	hsv(357, 73%, 70%)
CMYK	cmyk(0%, 73%, 69.1%, 30.2%)
CIE-LAB	lab(40.99, 52.29, 27.39)
CIE-LCH	lch(40.99, 59.03, 27.65°)
OKLab	oklab(51.15% 0.1534 0.0638)
OKLCH	oklch(51.15% 0.166 22.6)
XYZ	xyz(20.1088, 11.8577, 4.8436)
Luminance	0.1186 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23037 #30B2AB

analogous

#B23078 #B23037 #B26A30

triadic

#B23037 #37B230 #3037B2

tetradic

#B23037 #78B230 #30B2AB #6A30B2

square

#B23037 #78B230 #30B2AB #6A30B2

split-complementary

#B23037 #30B26A #3078B2

monochromatic

#521619 #822328 #B23037 #D05056 #DD8085

Accessibility & contrast

On white

6.23

#B23037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#B23037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23037

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23037	#FFFFFF	#000000	##FFFFFF
##B23037	1.00	6.23	3.37	6.23
#FFFFFF	6.23	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554F36

Deuteranopia (green-blind)

#766B33

Tritanopia (blue-blind)

#C40034

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #b23037;
/* rgb */ color: rgb(178, 48, 55);
/* oklch */ color: oklch(51.2% 0.166 22.6);

Tailwind

colors: {
  custom: {
    50: '#d1726e',
    500: '#b23037',
    950: '#000000',
  },
}

SCSS

$custom: #b23037;
$custom-light: #d1726e;
$custom-dark: #000000;

JSON

{
  "hex": "#b23037",
  "rgb": {
    "r": 178,
    "g": 48,
    "b": 55
  },
  "hsl": {
    "h": 356.769,
    "s": 57.522,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51153,
    "c": 0.16616,
    "h": 22.6
  },
  "luminance": 0.11855
}

Semantic roles & 50–950 ramp

primary

#B23037

secondary

#78C6C1

accent

#E1D847

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150807

muted

#837B7A

Preview Lab

Preview with #B23037

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

Preview Lab → · Contrast checker → · Palette generator →