#400903#400903

#400903 is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.5% C 0.085 H 31.6°. Best body text is #FFFFFF at 16.69:1 contrast (WCAG AA passes).

Color values

HEX	#400903
RGB	rgb(64, 9, 3)
HSL	hsl(6, 91%, 13%)
HSV	hsv(6, 95%, 25%)
CMYK	cmyk(0%, 85.9%, 95.3%, 74.9%)
CIE-LAB	lab(11.22, 25.78, 16.23)
CIE-LCH	lch(11.22, 30.46, 32.19°)
OKLab	oklab(24.46% 0.0725 0.0447)
OKLCH	oklch(24.46% 0.085 31.6)
XYZ	xyz(2.2288, 1.2923, 0.2182)
Luminance	0.0129 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400903 #033A40

analogous

#40031B #400903 #402703

triadic

#400903 #034009 #090340

tetradic

#400903 #1B4003 #033A40 #270340

square

#400903 #1B4003 #033A40 #270340

split-complementary

#400903 #034027 #031B40

monochromatic

#1D0401 #1D0401 #400903 #7A1106 #B51908

Accessibility & contrast

On white

16.69

#400903 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#400903 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400903

16.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400903	#FFFFFF	#000000	##FFFFFF
##400903	1.00	16.69	1.26	16.69
#FFFFFF	16.69	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A1602

Deuteranopia (green-blind)

#282201

Tritanopia (blue-blind)

#480008

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #400903;
/* rgb */ color: rgb(64, 9, 3);
/* oklch */ color: oklch(24.5% 0.085 31.6);

Tailwind

colors: {
  custom: {
    50: '#7a4e48',
    500: '#400903',
    950: '#000000',
  },
}

SCSS

$custom: #400903;
$custom-light: #7a4e48;
$custom-dark: #000000;

JSON

{
  "hex": "#400903",
  "rgb": {
    "r": 64,
    "g": 9,
    "b": 3
  },
  "hsl": {
    "h": 5.902,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.24456,
    "c": 0.08514,
    "h": 31.6
  },
  "luminance": 0.01292
}

Semantic roles & 50–950 ramp

primary

#400903

secondary

#1D7882

accent

#EAFF29

background

#F7F4F4

surface

#EEE7E6

border

#C9C3C2

text

#0A0200

muted

#7C7877

Preview Lab

Preview with #400903

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

Preview Lab → · Contrast checker → · Palette generator →