#B03F37#B03F37

#B03F37 is a mid, vivid red. Relative luminance 0.131; OKLCH L 52.5% C 0.149 H 27.4°. Best body text is #FFFFFF at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#B03F37
RGB	rgb(176, 63, 55)
HSL	hsl(4, 52%, 45%)
HSV	hsv(4, 69%, 69%)
CMYK	cmyk(0%, 64.2%, 68.8%, 31%)
CIE-LAB	lab(42.86, 45.53, 29.56)
CIE-LCH	lch(42.86, 54.29, 33.00°)
OKLab	oklab(52.49% 0.1323 0.0687)
OKLCH	oklch(52.49% 0.149 27.4)
XYZ	xyz(20.3737, 13.0638, 5.0624)
Luminance	0.1306 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03F37 #37A8B0

analogous

#B0376B #B03F37 #B07B37

triadic

#B03F37 #37B03F #3F37B0

tetradic

#B03F37 #6BB037 #37A8B0 #7B37B0

square

#B03F37 #6BB037 #37A8B0 #7B37B0

split-complementary

#B03F37 #37B07B #376BB0

monochromatic

#531E1A #812E28 #B03F37 #CB6159 #DA8D88

Accessibility & contrast

On white

5.81

#B03F37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#B03F37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03F37

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03F37	#FFFFFF	#000000	##FFFFFF
##B03F37	1.00	5.81	3.61	5.81
#FFFFFF	5.81	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5635

Deuteranopia (green-blind)

#7A6E34

Tritanopia (blue-blind)

#C1243E

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b03f37;
/* rgb */ color: rgb(176, 63, 55);
/* oklch */ color: oklch(52.5% 0.149 27.4);

Tailwind

colors: {
  custom: {
    50: '#cf796e',
    500: '#b03f37',
    950: '#000000',
  },
}

SCSS

$custom: #b03f37;
$custom-light: #cf796e;
$custom-dark: #000000;

JSON

{
  "hex": "#b03f37",
  "rgb": {
    "r": 176,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.967,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52485,
    "c": 0.14907,
    "h": 27.4
  },
  "luminance": 0.13061
}

Semantic roles & 50–950 ramp

primary

#B03F37

secondary

#7FBFC4

accent

#D2DC4C

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B03F37

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

Preview Lab → · Contrast checker → · Palette generator →