#4B100C#4B100C

#4B100C is a dark, moderate red. Relative luminance 0.019; OKLCH L 27.7% C 0.089 H 28.3°. Best body text is #FFFFFF at 15.23:1 contrast (WCAG AA passes).

Color values

HEX	#4B100C
RGB	rgb(75, 16, 12)
HSL	hsl(4, 72%, 17%)
HSV	hsv(4, 84%, 29%)
CMYK	cmyk(0%, 78.7%, 84%, 70.6%)
CIE-LAB	lab(14.92, 27.40, 17.89)
CIE-LCH	lch(14.92, 32.73, 33.15°)
OKLab	oklab(27.71% 0.0787 0.0423)
OKLCH	oklch(27.71% 0.089 28.3)
XYZ	xyz(3.1537, 1.8935, 0.5472)
Luminance	0.0189 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B100C #0C474B

analogous

#4B0C27 #4B100C #4B300C

triadic

#4B100C #0C4B10 #100C4B

tetradic

#4B100C #274B0C #0C474B #300C4B

square

#4B100C #274B0C #0C474B #300C4B

split-complementary

#4B100C #0C4B30 #0C274B

monochromatic

#1A0604 #1A0604 #4B100C #801B14 #B5271D

Accessibility & contrast

On white

15.23

#4B100C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#4B100C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B100C

15.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B100C	#FFFFFF	#000000	##FFFFFF
##4B100C	1.00	15.23	1.38	15.23
#FFFFFF	15.23	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#211D0B

Deuteranopia (green-blind)

#302A0A

Tritanopia (blue-blind)

#530010

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #4b100c;
/* rgb */ color: rgb(75, 16, 12);
/* oklch */ color: oklch(27.7% 0.089 28.3);

Tailwind

colors: {
  custom: {
    50: '#83534c',
    500: '#4b100c',
    950: '#000000',
  },
}

SCSS

$custom: #4b100c;
$custom-light: #83534c;
$custom-dark: #000000;

JSON

{
  "hex": "#4b100c",
  "rgb": {
    "r": 75,
    "g": 16,
    "b": 12
  },
  "hsl": {
    "h": 3.81,
    "s": 72.414,
    "l": 17.059
  },
  "oklch": {
    "l": 0.27706,
    "c": 0.08937,
    "h": 28.3
  },
  "luminance": 0.01893
}

Semantic roles & 50–950 ramp

primary

#4B100C

secondary

#2C8187

accent

#E4EF39

background

#F8F4F4

surface

#F0E7E7

border

#CBC3C3

text

#0C0301

muted

#7D7877

Preview Lab

Preview with #4B100C

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

Preview Lab → · Contrast checker → · Palette generator →