#CB3939#CB3939

#CB3939 is a mid, vivid red. Relative luminance 0.159; OKLCH L 56.4% C 0.183 H 25.3°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#CB3939
RGB	rgb(203, 57, 57)
HSL	hsl(0, 58%, 51%)
HSV	hsv(0, 72%, 80%)
CMYK	cmyk(0%, 71.9%, 71.9%, 20.4%)
CIE-LAB	lab(46.87, 57.01, 34.33)
CIE-LCH	lch(46.87, 66.55, 31.06°)
OKLab	oklab(56.4% 0.1656 0.0782)
OKLCH	oklch(56.4% 0.183 25.3)
XYZ	xyz(26.8333, 15.9222, 5.5305)
Luminance	0.1592 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3939 #39CBCB

analogous

#CB3982 #CB3939 #CB8239

triadic

#CB3939 #39CB39 #3939CB

tetradic

#CB3939 #82CB39 #39CBCB #8239CB

square

#CB3939 #82CB39 #39CBCB #8239CB

split-complementary

#CB3939 #39CB82 #3982CB

monochromatic

#6D1D1D #9D2929 #CB3939 #D86969 #E49A9A

Accessibility & contrast

On white

5.02

#CB3939 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.18

#CB3939 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3939

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3939	#FFFFFF	#000000	##FFFFFF
##CB3939	1.00	5.02	4.18	5.02
#FFFFFF	5.02	1.00	21.00	1.00
#000000	4.18	21.00	1.00	21.00
##FFFFFF	5.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#635B37

Deuteranopia (green-blind)

#887B34

Tritanopia (blue-blind)

#DF003B

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #cb3939;
/* rgb */ color: rgb(203, 57, 57);
/* oklch */ color: oklch(56.4% 0.183 25.3);

Tailwind

colors: {
  custom: {
    50: '#e37a70',
    500: '#cb3939',
    950: '#000000',
  },
}

SCSS

$custom: #cb3939;
$custom-light: #e37a70;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3939",
  "rgb": {
    "r": 203,
    "g": 57,
    "b": 57
  },
  "hsl": {
    "h": 0,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.56399,
    "c": 0.18316,
    "h": 25.3
  },
  "luminance": 0.15918
}

Semantic roles & 50–950 ramp

primary

#CB3939

secondary

#90D0D0

accent

#E2E246

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3939

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

Preview Lab → · Contrast checker → · Palette generator →