#B54037#B54037

#B54037 is a mid, vivid red. Relative luminance 0.138; OKLCH L 53.4% C 0.154 H 27.8°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#B54037
RGB	rgb(181, 64, 55)
HSL	hsl(4, 53%, 46%)
HSV	hsv(4, 70%, 71%)
CMYK	cmyk(0%, 64.6%, 69.6%, 29%)
CIE-LAB	lab(43.90, 46.84, 31.02)
CIE-LCH	lch(43.90, 56.18, 33.51°)
OKLab	oklab(53.43% 0.1359 0.0716)
OKLCH	oklch(53.43% 0.154 27.8)
XYZ	xyz(21.5813, 13.7694, 5.1350)
Luminance	0.1377 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B54037 #37ACB5

analogous

#B5376D #B54037 #B57F37

triadic

#B54037 #37B540 #4037B5

tetradic

#B54037 #6DB537 #37ACB5 #7F37B5

square

#B54037 #6DB537 #37ACB5 #7F37B5

split-complementary

#B54037 #37B57F #376DB5

monochromatic

#571F1A #862F29 #B54037 #CD645C #DC918B

Accessibility & contrast

On white

5.60

#B54037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#B54037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B54037

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B54037	#FFFFFF	#000000	##FFFFFF
##B54037	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605835

Deuteranopia (green-blind)

#7D7134

Tritanopia (blue-blind)

#C7233F

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #b54037;
/* rgb */ color: rgb(181, 64, 55);
/* oklch */ color: oklch(53.4% 0.154 27.8);

Tailwind

colors: {
  custom: {
    50: '#d27b6e',
    500: '#b54037',
    950: '#000000',
  },
}

SCSS

$custom: #b54037;
$custom-light: #d27b6e;
$custom-dark: #000000;

JSON

{
  "hex": "#b54037",
  "rgb": {
    "r": 181,
    "g": 64,
    "b": 55
  },
  "hsl": {
    "h": 4.286,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.53433,
    "c": 0.15358,
    "h": 27.8
  },
  "luminance": 0.13766
}

Semantic roles & 50–950 ramp

primary

#B54037

secondary

#82C1C6

accent

#D2DD4B

background

#FDF7F6

surface

#FBEEEC

border

#D4C9C7

text

#150A07

muted

#837C7A

Preview Lab

Preview with #B54037

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

Preview Lab → · Contrast checker → · Palette generator →