#4B101D#4B101D

#4B101D is a dark, moderate red. Relative luminance 0.020; OKLCH L 28.1% C 0.088 H 12.2°. Best body text is #FFFFFF at 15.10:1 contrast (WCAG AA passes).

Color values

HEX	#4B101D
RGB	rgb(75, 16, 29)
HSL	hsl(347, 65%, 18%)
HSV	hsv(347, 79%, 29%)
CMYK	cmyk(0%, 78.7%, 61.3%, 70.6%)
CIE-LAB	lab(15.25, 28.55, 7.42)
CIE-LCH	lch(15.25, 29.50, 14.56°)
OKLab	oklab(28.06% 0.0863 0.0186)
OKLCH	oklch(28.06% 0.088 12.2)
XYZ	xyz(3.3090, 1.9556, 1.3654)
Luminance	0.0196 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B101D #104B3E

analogous

#4B103A #4B101D #4B2110

triadic

#4B101D #1D4B10 #101D4B

tetradic

#4B101D #3A4B10 #104B3E #21104B

square

#4B101D #3A4B10 #104B3E #21104B

split-complementary

#4B101D #104B21 #103A4B

monochromatic

#19050A #19050A #4B101D #7D1B31 #B02644

Accessibility & contrast

On white

15.10

#4B101D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#4B101D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B101D

15.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B101D	#FFFFFF	#000000	##FFFFFF
##4B101D	1.00	15.10	1.39	15.10
#FFFFFF	15.10	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F1F1D

Deuteranopia (green-blind)

#2E2B1C

Tritanopia (blue-blind)

#530415

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #4b101d;
/* rgb */ color: rgb(75, 16, 29);
/* oklch */ color: oklch(28.1% 0.088 12.2);

Tailwind

colors: {
  custom: {
    50: '#825358',
    500: '#4b101d',
    950: '#000000',
  },
}

SCSS

$custom: #4b101d;
$custom-light: #825358;
$custom-dark: #000000;

JSON

{
  "hex": "#4b101d",
  "rgb": {
    "r": 75,
    "g": 16,
    "b": 29
  },
  "hsl": {
    "h": 346.78,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.28063,
    "c": 0.08827,
    "h": 12.2
  },
  "luminance": 0.01955
}

Semantic roles & 50–950 ramp

primary

#4B101D

secondary

#328573

accent

#E8C340

background

#F8F4F5

surface

#EFE8E9

border

#CAC4C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4B101D

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

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