#B74037#B74037

#B74037 is a mid, vivid red. Relative luminance 0.140; OKLCH L 53.8% C 0.156 H 27.8°. Best body text is #FFFFFF at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#B74037
RGB	rgb(183, 64, 55)
HSL	hsl(4, 54%, 47%)
HSV	hsv(4, 70%, 72%)
CMYK	cmyk(0%, 65%, 69.9%, 28.2%)
CIE-LAB	lab(44.25, 47.54, 31.52)
CIE-LCH	lch(44.25, 57.04, 33.54°)
OKLab	oklab(53.76% 0.1378 0.0727)
OKLCH	oklch(53.76% 0.156 27.8)
XYZ	xyz(22.0537, 14.0130, 5.1572)
Luminance	0.1401 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B74037 #37AEB7

analogous

#B7376E #B74037 #B78037

triadic

#B74037 #37B740 #4037B7

tetradic

#B74037 #6EB737 #37AEB7 #8037B7

square

#B74037 #6EB737 #37AEB7 #8037B7

split-complementary

#B74037 #37B780 #376EB7

monochromatic

#591F1B #883029 #B74037 #CE655D #DC928C

Accessibility & contrast

On white

5.52

#B74037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#B74037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B74037

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B74037	#FFFFFF	#000000	##FFFFFF
##B74037	1.00	5.52	3.80	5.52
#FFFFFF	5.52	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615835

Deuteranopia (green-blind)

#7E7233

Tritanopia (blue-blind)

#C9223F

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #b74037;
/* rgb */ color: rgb(183, 64, 55);
/* oklch */ color: oklch(53.8% 0.156 27.8);

Tailwind

colors: {
  custom: {
    50: '#d47b6e',
    500: '#b74037',
    950: '#000000',
  },
}

SCSS

$custom: #b74037;
$custom-light: #d47b6e;
$custom-dark: #000000;

JSON

{
  "hex": "#b74037",
  "rgb": {
    "r": 183,
    "g": 64,
    "b": 55
  },
  "hsl": {
    "h": 4.219,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53762,
    "c": 0.15578,
    "h": 27.8
  },
  "luminance": 0.1401
}

Semantic roles & 50–950 ramp

primary

#B74037

secondary

#83C2C7

accent

#D3DD4B

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160A07

muted

#847C7A

Preview Lab

Preview with #B74037

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

Preview Lab → · Contrast checker → · Palette generator →