#400304#400304

#400304 is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.8% C 0.091 H 26.9°. Best body text is #FFFFFF at 17.03:1 contrast (WCAG AA passes).

Color values

HEX	#400304
RGB	rgb(64, 3, 4)
HSL	hsl(359, 91%, 13%)
HSV	hsv(359, 95%, 25%)
CMYK	cmyk(0%, 95.3%, 93.8%, 74.9%)
CIE-LAB	lab(10.29, 28.50, 14.52)
CIE-LCH	lch(10.29, 31.99, 26.99°)
OKLab	oklab(23.77% 0.0814 0.0413)
OKLCH	oklch(23.77% 0.091 26.9)
XYZ	xyz(2.1691, 1.1642, 0.2254)
Luminance	0.0116 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400304 #03403F

analogous

#400322 #400304 #402003

triadic

#400304 #044003 #030440

tetradic

#400304 #224003 #03403F #200340

square

#400304 #224003 #03403F #200340

split-complementary

#400304 #034020 #032240

monochromatic

#1D0102 #1D0102 #400304 #7A0608 #B5080B

Accessibility & contrast

On white

17.03

#400304 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#400304 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400304

17.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400304	#FFFFFF	#000000	##FFFFFF
##400304	1.00	17.03	1.23	17.03
#FFFFFF	17.03	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#171303

Deuteranopia (green-blind)

#262102

Tritanopia (blue-blind)

#480004

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #400304;
/* rgb */ color: rgb(64, 3, 4);
/* oklch */ color: oklch(23.8% 0.091 26.9);

Tailwind

colors: {
  custom: {
    50: '#7b4b48',
    500: '#400304',
    950: '#000000',
  },
}

SCSS

$custom: #400304;
$custom-light: #7b4b48;
$custom-dark: #000000;

JSON

{
  "hex": "#400304",
  "rgb": {
    "r": 64,
    "g": 3,
    "b": 4
  },
  "hsl": {
    "h": 359.016,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23769,
    "c": 0.09126,
    "h": 26.9
  },
  "luminance": 0.01164
}

Semantic roles & 50–950 ramp

primary

#400304

secondary

#1D8280

accent

#FFFB29

background

#F7F4F4

surface

#EEE7E6

border

#C9C3C2

text

#0A0100

muted

#7C7777

Preview Lab

Preview with #400304

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

Preview Lab → · Contrast checker → · Palette generator →