#40101B#40101B

#40101B is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.8% C 0.075 H 10.3°. Best body text is #FFFFFF at 16.06:1 contrast (WCAG AA passes).

Color values

HEX	#40101B
RGB	rgb(64, 16, 27)
HSL	hsl(346, 60%, 16%)
HSV	hsv(346, 75%, 25%)
CMYK	cmyk(0%, 75%, 57.8%, 74.9%)
CIE-LAB	lab(12.86, 24.25, 5.22)
CIE-LCH	lch(12.86, 24.81, 12.15°)
OKLab	oklab(25.83% 0.0736 0.0134)
OKLCH	oklch(25.83% 0.075 10.3)
XYZ	xyz(2.4977, 1.5400, 1.2024)
Luminance	0.0154 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40101B #104035

analogous

#401033 #40101B #401D10

triadic

#40101B #1B4010 #101B40

tetradic

#40101B #334010 #104035 #1D1040

square

#40101B #334010 #104035 #1D1040

split-complementary

#40101B #10401D #103340

monochromatic

#18060A #18060A #40101B #711C30 #A22844

Accessibility & contrast

On white

16.06

#40101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#40101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40101B

16.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40101B	#FFFFFF	#000000	##FFFFFF
##40101B	1.00	16.06	1.31	16.06
#FFFFFF	16.06	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B1B1B

Deuteranopia (green-blind)

#28251A

Tritanopia (blue-blind)

#460814

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #40101b;
/* rgb */ color: rgb(64, 16, 27);
/* oklch */ color: oklch(25.8% 0.075 10.3);

Tailwind

colors: {
  custom: {
    50: '#785257',
    500: '#40101b',
    950: '#000000',
  },
}

SCSS

$custom: #40101b;
$custom-light: #785257;
$custom-dark: #000000;

JSON

{
  "hex": "#40101b",
  "rgb": {
    "r": 64,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 346.25,
    "s": 60,
    "l": 15.686
  },
  "oklch": {
    "l": 0.25831,
    "c": 0.07475,
    "h": 10.3
  },
  "luminance": 0.0154
}

Semantic roles & 50–950 ramp

primary

#40101B

secondary

#327A69

accent

#E3BF45

background

#F7F4F5

surface

#EEE7E9

border

#C9C3C5

text

#090203

muted

#7B7878

Preview Lab

Preview with #40101B

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

Preview Lab → · Contrast checker → · Palette generator →