#400309#400309

#400309 is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.9% C 0.091 H 22.3°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#400309
RGB	rgb(64, 3, 9)
HSL	hsl(354, 91%, 13%)
HSV	hsv(354, 95%, 25%)
CMYK	cmyk(0%, 95.3%, 85.9%, 74.9%)
CIE-LAB	lab(10.37, 28.74, 12.60)
CIE-LCH	lch(10.37, 31.38, 23.67°)
OKLab	oklab(23.86% 0.0838 0.0344)
OKLCH	oklch(23.86% 0.091 22.3)
XYZ	xyz(2.1965, 1.1752, 0.3696)
Luminance	0.0118 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400309 #03403A

analogous

#400327 #400309 #401B03

triadic

#400309 #094003 #030940

tetradic

#400309 #274003 #03403A #1B0340

square

#400309 #274003 #03403A #1B0340

split-complementary

#400309 #03401B #032740

monochromatic

#1D0104 #1D0104 #400309 #7A0611 #B50819

Accessibility & contrast

On white

17.00

#400309 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#400309 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400309

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400309	#FFFFFF	#000000	##FFFFFF
##400309	1.00	17.00	1.23	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#161409

Deuteranopia (green-blind)

#262107

Tritanopia (blue-blind)

#470006

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #400309;
/* rgb */ color: rgb(64, 3, 9);
/* oklch */ color: oklch(23.9% 0.091 22.3);

Tailwind

colors: {
  custom: {
    50: '#7a4b4a',
    500: '#400309',
    950: '#000000',
  },
}

SCSS

$custom: #400309;
$custom-light: #7a4b4a;
$custom-dark: #000000;

JSON

{
  "hex": "#400309",
  "rgb": {
    "r": 64,
    "g": 3,
    "b": 9
  },
  "hsl": {
    "h": 354.098,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23856,
    "c": 0.09058,
    "h": 22.3
  },
  "luminance": 0.01175
}

Semantic roles & 50–950 ramp

primary

#400309

secondary

#1D8278

accent

#FFEA29

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #400309

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

Preview Lab → · Contrast checker → · Palette generator →