#4C101B#4C101B

#4C101B is a dark, moderate red. Relative luminance 0.020; OKLCH L 28.2% C 0.089 H 14.6°. Best body text is #FFFFFF at 15.03:1 contrast (WCAG AA passes).

Color values

HEX	#4C101B
RGB	rgb(76, 16, 27)
HSL	hsl(349, 65%, 18%)
HSV	hsv(349, 79%, 30%)
CMYK	cmyk(0%, 78.9%, 64.5%, 70.2%)
CIE-LAB	lab(15.42, 28.74, 9.13)
CIE-LCH	lch(15.42, 30.16, 17.63°)
OKLab	oklab(28.21% 0.0864 0.0226)
OKLCH	oklch(28.21% 0.089 14.6)
XYZ	xyz(3.3639, 1.9867, 1.2430)
Luminance	0.0199 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C101B #104C41

analogous

#4C1039 #4C101B #4C2310

triadic

#4C101B #1B4C10 #101B4C

tetradic

#4C101B #394C10 #104C41 #23104C

square

#4C101B #394C10 #104C41 #23104C

split-complementary

#4C101B #104C23 #10394C

monochromatic

#190509 #190509 #4C101B #7F1B2D #B1253F

Accessibility & contrast

On white

15.03

#4C101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#4C101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4C101B

15.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C101B	#FFFFFF	#000000	##FFFFFF
##4C101B	1.00	15.03	1.40	15.03
#FFFFFF	15.03	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#201F1B

Deuteranopia (green-blind)

#2F2B19

Tritanopia (blue-blind)

#540315

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #4c101b;
/* rgb */ color: rgb(76, 16, 27);
/* oklch */ color: oklch(28.2% 0.089 14.6);

Tailwind

colors: {
  custom: {
    50: '#835357',
    500: '#4c101b',
    950: '#000000',
  },
}

SCSS

$custom: #4c101b;
$custom-light: #835357;
$custom-dark: #000000;

JSON

{
  "hex": "#4c101b",
  "rgb": {
    "r": 76,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 349,
    "s": 65.217,
    "l": 18.039
  },
  "oklch": {
    "l": 0.28209,
    "c": 0.08928,
    "h": 14.6
  },
  "luminance": 0.01986
}

Semantic roles & 50–950 ramp

primary

#4C101B

secondary

#328676

accent

#E8C940

background

#F8F4F5

surface

#EFE8E9

border

#CAC4C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4C101B

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

Preview Lab → · Contrast checker → · Palette generator →