#CB3F3B#CB3F3B

#CB3F3B is a mid, vivid red. Relative luminance 0.166; OKLCH L 57.0% C 0.177 H 26.1°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#CB3F3B
RGB	rgb(203, 63, 59)
HSL	hsl(2, 58%, 51%)
HSV	hsv(2, 71%, 80%)
CMYK	cmyk(0%, 69%, 70.9%, 20.4%)
CIE-LAB	lab(47.72, 54.85, 34.16)
CIE-LCH	lch(47.72, 64.62, 31.91°)
OKLab	oklab(57.04% 0.1593 0.0782)
OKLCH	oklch(57.04% 0.177 26.1)
XYZ	xyz(27.1985, 16.5713, 5.9032)
Luminance	0.1657 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3F3B #3BC7CB

analogous

#CB3B7F #CB3F3B #CB873B

triadic

#CB3F3B #3BCB3F #3F3BCB

tetradic

#CB3F3B #7FCB3B #3BC7CB #873BCB

square

#CB3F3B #7FCB3B #3BC7CB #873BCB

split-complementary

#CB3F3B #3BCB87 #3B7FCB

monochromatic

#6E201D #9F2D2A #CB3F3B #D86E6B #E59E9C

Accessibility & contrast

On white

4.87

#CB3F3B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#CB3F3B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3F3B

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3F3B	#FFFFFF	#000000	##FFFFFF
##CB3F3B	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#675E39

Deuteranopia (green-blind)

#8A7C36

Tritanopia (blue-blind)

#DF123F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #cb3f3b;
/* rgb */ color: rgb(203, 63, 59);
/* oklch */ color: oklch(57.0% 0.177 26.1);

Tailwind

colors: {
  custom: {
    50: '#e37d71',
    500: '#cb3f3b',
    950: '#000000',
  },
}

SCSS

$custom: #cb3f3b;
$custom-light: #e37d71;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3f3b",
  "rgb": {
    "r": 203,
    "g": 63,
    "b": 59
  },
  "hsl": {
    "h": 1.667,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.57037,
    "c": 0.17741,
    "h": 26.1
  },
  "luminance": 0.16567
}

Semantic roles & 50–950 ramp

primary

#CB3F3B

secondary

#91CFD1

accent

#DDE147

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3F3B

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

Preview Lab → · Contrast checker → · Palette generator →