#CB3737#CB3737

#CB3737 is a mid, vivid red. Relative luminance 0.157; OKLCH L 56.2% C 0.185 H 25.5°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX#CB3737
RGBrgb(203, 55, 55)
HSLhsl(0, 59%, 51%)
HSVhsv(0, 73%, 80%)
CMYKcmyk(0%, 72.9%, 72.9%, 20.4%)
CIE-LABlab(46.59, 57.63, 35.16)
CIE-LCHlch(46.59, 67.51, 31.39°)
OKLaboklab(56.18% 0.1672 0.0796)
OKLCHoklch(56.18% 0.185 25.5)
XYZxyz(26.6874, 15.7088, 5.2406)
Luminance0.1570 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#CB3737 #37CBCB
analogous
#CB3781 #CB3737 #CB8137
triadic
#CB3737 #37CB37 #3737CB
tetradic
#CB3737 #81CB37 #37CBCB #8137CB
square
#CB3737 #81CB37 #37CBCB #8137CB
split-complementary
#CB3737 #37CB81 #3781CB
monochromatic
#6C1C1C #9C2929 #CB3737 #D86868 #E49898

Accessibility & contrast

On white

5.07
#CB3737 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.14
#CB3737 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3737
5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##CB3737#FFFFFF#000000##FFFFFF
##CB37371.005.074.145.07
#FFFFFF5.071.0021.001.00
#0000004.1421.001.0021.00
##FFFFFF5.071.0021.001.00

Color blindness preview

Protanopia (red-blind)
#625A35
Deuteranopia (green-blind)
#877A32
Tritanopia (blue-blind)
#DF0039
Achromatopsia (no color)
#6E6E6E

Design tokens & code

CSS
--color: #cb3737;
/* rgb */ color: rgb(203, 55, 55);
/* oklch */ color: oklch(56.2% 0.185 25.5);
Tailwind
colors: {
  custom: {
    50: '#e4796e',
    500: '#cb3737',
    950: '#000000',
  },
}
SCSS
$custom: #cb3737;
$custom-light: #e4796e;
$custom-dark: #000000;
JSON
{
  "hex": "#cb3737",
  "rgb": {
    "r": 203,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56181,
    "c": 0.18516,
    "h": 25.5
  },
  "luminance": 0.15705
}

Semantic roles & 50–950 ramp

primary
#CB3737
secondary
#8ED0D0
accent
#E2E246
background
#FFF7F6
surface
#FEEEEC
border
#D6C9C7
text
#170A07
muted
#857C7A

Preview Lab

Preview with #CB3737

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

Preview Lab → · Contrast checker → · Palette generator →

#CB3737 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva