#4C100B#4C100B

#4C100B is a dark, moderate red. Relative luminance 0.019; OKLCH L 27.9% C 0.091 H 29.0°. Best body text is #FFFFFF at 15.15:1 contrast (WCAG AA passes).

Color values

HEX	#4C100B
RGB	rgb(76, 16, 11)
HSL	hsl(5, 75%, 17%)
HSV	hsv(5, 86%, 30%)
CMYK	cmyk(0%, 78.9%, 85.5%, 70.2%)
CIE-LAB	lab(15.12, 27.74, 18.65)
CIE-LCH	lch(15.12, 33.42, 33.91°)
OKLab	oklab(27.9% 0.0794 0.044)
OKLCH	oklch(27.9% 0.091 29)
XYZ	xyz(3.2266, 1.9317, 0.5195)
Luminance	0.0193 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C100B #0B474C

analogous

#4C0B27 #4C100B #4C310B

triadic

#4C100B #0B4C10 #100B4C

tetradic

#4C100B #274C0B #0B474C #310B4C

square

#4C100B #274C0B #0B474C #310B4C

split-complementary

#4C100B #0B4C31 #0B274C

monochromatic

#1B0604 #1B0604 #4C100B #811B13 #B7271A

Accessibility & contrast

On white

15.15

#4C100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#4C100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4C100B

15.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C100B	#FFFFFF	#000000	##FFFFFF
##4C100B	1.00	15.15	1.39	15.15
#FFFFFF	15.15	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#221E0A

Deuteranopia (green-blind)

#312B09

Tritanopia (blue-blind)

#54000F

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #4c100b;
/* rgb */ color: rgb(76, 16, 11);
/* oklch */ color: oklch(27.9% 0.091 29.0);

Tailwind

colors: {
  custom: {
    50: '#84534b',
    500: '#4c100b',
    950: '#000000',
  },
}

SCSS

$custom: #4c100b;
$custom-light: #84534b;
$custom-dark: #000000;

JSON

{
  "hex": "#4c100b",
  "rgb": {
    "r": 76,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 4.615,
    "s": 74.713,
    "l": 17.059
  },
  "oklch": {
    "l": 0.27897,
    "c": 0.09075,
    "h": 29
  },
  "luminance": 0.01931
}

Semantic roles & 50–950 ramp

primary

#4C100B

secondary

#2B8188

accent

#E3F136

background

#F8F4F4

surface

#F0E7E7

border

#CBC3C3

text

#0C0301

muted

#7D7877

Preview Lab

Preview with #4C100B

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

Preview Lab → · Contrast checker → · Palette generator →