#4B101B#4B101B

#4B101B is a dark, moderate red. Relative luminance 0.019; OKLCH L 28.0% C 0.088 H 14.3°. Best body text is #FFFFFF at 15.12:1 contrast (WCAG AA passes).

Color values

HEX	#4B101B
RGB	rgb(75, 16, 27)
HSL	hsl(349, 65%, 18%)
HSV	hsv(349, 79%, 29%)
CMYK	cmyk(0%, 78.7%, 64%, 70.6%)
CIE-LAB	lab(15.20, 28.38, 8.81)
CIE-LCH	lch(15.20, 29.72, 17.24°)
OKLab	oklab(28.01% 0.0854 0.0218)
OKLCH	oklch(28.01% 0.088 14.3)
XYZ	xyz(3.2851, 1.9460, 1.2393)
Luminance	0.0195 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B101B #104B40

analogous

#4B1038 #4B101B #4B2310

triadic

#4B101B #1B4B10 #101B4B

tetradic

#4B101B #384B10 #104B40 #23104B

square

#4B101B #384B10 #104B40 #23104B

split-complementary

#4B101B #104B23 #10384B

monochromatic

#190509 #190509 #4B101B #7D1B2D #B0263F

Accessibility & contrast

On white

15.12

#4B101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#4B101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B101B

15.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B101B	#FFFFFF	#000000	##FFFFFF
##4B101B	1.00	15.12	1.39	15.12
#FFFFFF	15.12	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F1E1B

Deuteranopia (green-blind)

#2E2B19

Tritanopia (blue-blind)

#530315

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #4b101b;
/* rgb */ color: rgb(75, 16, 27);
/* oklch */ color: oklch(28.0% 0.088 14.3);

Tailwind

colors: {
  custom: {
    50: '#825357',
    500: '#4b101b',
    950: '#000000',
  },
}

SCSS

$custom: #4b101b;
$custom-light: #825357;
$custom-dark: #000000;

JSON

{
  "hex": "#4b101b",
  "rgb": {
    "r": 75,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 348.814,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.28009,
    "c": 0.0881,
    "h": 14.3
  },
  "luminance": 0.01946
}

Semantic roles & 50–950 ramp

primary

#4B101B

secondary

#328575

accent

#E8C940

background

#F8F4F5

surface

#EFE7E9

border

#CAC3C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4B101B

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

Preview Lab → · Contrast checker → · Palette generator →