#B53739#B53739

#B53739 is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.4% C 0.162 H 23.9°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#B53739
RGB	rgb(181, 55, 57)
HSL	hsl(359, 53%, 46%)
HSV	hsv(359, 70%, 71%)
CMYK	cmyk(0%, 69.6%, 68.5%, 29%)
CIE-LAB	lab(42.54, 50.71, 28.20)
CIE-LCH	lch(42.54, 58.02, 29.08°)
OKLab	oklab(52.43% 0.1485 0.0657)
OKLCH	oklch(52.43% 0.162 23.9)
XYZ	xyz(21.1630, 12.8546, 5.2369)
Luminance	0.1285 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B53739 #37B5B3

analogous

#B53778 #B53739 #B57437

triadic

#B53739 #39B537 #3739B5

tetradic

#B53739 #78B537 #37B5B3 #7437B5

square

#B53739 #78B537 #37B5B3 #7437B5

split-complementary

#B53739 #37B574 #3778B5

monochromatic

#571A1B #86292A #B53739 #CD5C5E #DC8B8C

Accessibility & contrast

On white

5.88

#B53739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#B53739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B53739

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B53739	#FFFFFF	#000000	##FFFFFF
##B53739	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5338

Deuteranopia (green-blind)

#7A6E35

Tritanopia (blue-blind)

#C71039

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b53739;
/* rgb */ color: rgb(181, 55, 57);
/* oklch */ color: oklch(52.4% 0.162 23.9);

Tailwind

colors: {
  custom: {
    50: '#d3766f',
    500: '#b53739',
    950: '#000000',
  },
}

SCSS

$custom: #b53739;
$custom-light: #d3766f;
$custom-dark: #000000;

JSON

{
  "hex": "#b53739",
  "rgb": {
    "r": 181,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.048,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.52425,
    "c": 0.16236,
    "h": 23.9
  },
  "luminance": 0.12852
}

Semantic roles & 50–950 ramp

primary

#B53739

secondary

#82C6C5

accent

#DDDA4B

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B53739

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

Preview Lab → · Contrast checker → · Palette generator →