#B23739#B23739

#B23739 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.159 H 23.7°. Best body text is #FFFFFF at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#B23739
RGB	rgb(178, 55, 57)
HSL	hsl(359, 53%, 46%)
HSV	hsv(359, 69%, 70%)
CMYK	cmyk(0%, 69.1%, 68%, 30.2%)
CIE-LAB	lab(41.99, 49.72, 27.41)
CIE-LCH	lch(41.99, 56.77, 28.86°)
OKLab	oklab(51.91% 0.1457 0.0641)
OKLCH	oklch(51.91% 0.159 23.7)
XYZ	xyz(20.4670, 12.4957, 5.2043)
Luminance	0.1249 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B23739 #37B2B0

analogous

#B23777 #B23739 #B27237

triadic

#B23739 #39B237 #3739B2

tetradic

#B23739 #77B237 #37B2B0 #7237B2

square

#B23739 #77B237 #37B2B0 #7237B2

split-complementary

#B23739 #37B272 #3777B2

monochromatic

#541A1B #83292A #B23739 #CC5A5C #DB898A

Accessibility & contrast

On white

6.00

#B23739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#B23739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B23739

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B23739	#FFFFFF	#000000	##FFFFFF
##B23739	1.00	6.00	3.50	6.00
#FFFFFF	6.00	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	6.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595238

Deuteranopia (green-blind)

#786D35

Tritanopia (blue-blind)

#C31339

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b23739;
/* rgb */ color: rgb(178, 55, 57);
/* oklch */ color: oklch(51.9% 0.159 23.7);

Tailwind

colors: {
  custom: {
    50: '#d0766f',
    500: '#b23739',
    950: '#000000',
  },
}

SCSS

$custom: #b23739;
$custom-light: #d0766f;
$custom-dark: #000000;

JSON

{
  "hex": "#b23739",
  "rgb": {
    "r": 178,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.024,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.51913,
    "c": 0.15918,
    "h": 23.7
  },
  "luminance": 0.12493
}

Semantic roles & 50–950 ramp

primary

#B23739

secondary

#80C5C4

accent

#DCDA4C

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B23739

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

Preview Lab → · Contrast checker → · Palette generator →