#B43F37#B43F37

#B43F37 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.1% C 0.153 H 27.4°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#B43F37
RGB	rgb(180, 63, 55)
HSL	hsl(4, 53%, 46%)
HSV	hsv(4, 69%, 71%)
CMYK	cmyk(0%, 65%, 69.4%, 29.4%)
CIE-LAB	lab(43.56, 46.93, 30.57)
CIE-LCH	lch(43.56, 56.01, 33.08°)
OKLab	oklab(53.15% 0.1363 0.0707)
OKLCH	oklch(53.15% 0.154 27.4)
XYZ	xyz(21.2917, 13.5371, 5.1055)
Luminance	0.1353 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B43F37 #37ACB4

analogous

#B4376D #B43F37 #B47D37

triadic

#B43F37 #37B43F #3F37B4

tetradic

#B43F37 #6DB437 #37ACB4 #7D37B4

square

#B43F37 #6DB437 #37ACB4 #7D37B4

split-complementary

#B43F37 #37B47D #376DB4

monochromatic

#561E1A #852F29 #B43F37 #CD635B #DB8F8A

Accessibility & contrast

On white

5.67

#B43F37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#B43F37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B43F37

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B43F37	#FFFFFF	#000000	##FFFFFF
##B43F37	1.00	5.67	3.71	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F5735

Deuteranopia (green-blind)

#7C7034

Tritanopia (blue-blind)

#C6223E

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #b43f37;
/* rgb */ color: rgb(180, 63, 55);
/* oklch */ color: oklch(53.1% 0.153 27.4);

Tailwind

colors: {
  custom: {
    50: '#d27a6e',
    500: '#b43f37',
    950: '#000000',
  },
}

SCSS

$custom: #b43f37;
$custom-light: #d27a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#b43f37",
  "rgb": {
    "r": 180,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.84,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.53145,
    "c": 0.1535,
    "h": 27.4
  },
  "luminance": 0.13534
}

Semantic roles & 50–950 ramp

primary

#B43F37

secondary

#81C1C6

accent

#D3DD4B

background

#FDF7F6

surface

#FBEEEC

border

#D4C9C7

text

#150A07

muted

#837C7A

Preview Lab

Preview with #B43F37

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

Preview Lab → · Contrast checker → · Palette generator →