#D03737#D03737

#D03737 is a mid, vivid red. Relative luminance 0.164; OKLCH L 57.0% C 0.190 H 25.6°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#D03737
RGB	rgb(208, 55, 55)
HSL	hsl(0, 62%, 52%)
HSV	hsv(0, 74%, 82%)
CMYK	cmyk(0%, 73.6%, 73.6%, 18.4%)
CIE-LAB	lab(47.52, 59.17, 36.47)
CIE-LCH	lch(47.52, 69.51, 31.65°)
OKLab	oklab(57.05% 0.1714 0.0822)
OKLCH	oklch(57.05% 0.19 25.6)
XYZ	xyz(28.0714, 16.4224, 5.3054)
Luminance	0.1642 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#D03737 #37D0D0

analogous

#D03784 #D03737 #D08437

triadic

#D03737 #37D037 #3737D0

tetradic

#D03737 #84D037 #37D0D0 #8437D0

square

#D03737 #84D037 #37D0D0 #8437D0

split-complementary

#D03737 #37D084 #3784D0

monochromatic

#721B1B #A32626 #D03737 #DC6969 #E79A9A

Accessibility & contrast

On white

4.90

#D03737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#D03737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #D03737

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##D03737	#FFFFFF	#000000	##FFFFFF
##D03737	1.00	4.90	4.28	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#645C35

Deuteranopia (green-blind)

#8A7D31

Tritanopia (blue-blind)

#E50039

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #d03737;
/* rgb */ color: rgb(208, 55, 55);
/* oklch */ color: oklch(57.0% 0.190 25.6);

Tailwind

colors: {
  custom: {
    50: '#e7796e',
    500: '#d03737',
    950: '#000000',
  },
}

SCSS

$custom: #d03737;
$custom-light: #e7796e;
$custom-dark: #000000;

JSON

{
  "hex": "#d03737",
  "rgb": {
    "r": 208,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.57046,
    "c": 0.1901,
    "h": 25.6
  },
  "luminance": 0.16418
}

Semantic roles & 50–950 ramp

primary

#D03737

secondary

#90D3D3

accent

#E5E543

background

#FFF7F6

surface

#FFEEEC

border

#D7C9C7

text

#180A07

muted

#867C7A

Preview Lab

Preview with #D03737

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

Preview Lab → · Contrast checker → · Palette generator →