#400B10#400B10

#400B10 is a very dark, moderate red. Relative luminance 0.014; OKLCH L 24.9% C 0.081 H 20.4°. Best body text is #FFFFFF at 16.49:1 contrast (WCAG AA passes).

Color values

HEX	#400B10
RGB	rgb(64, 11, 16)
HSL	hsl(354, 71%, 15%)
HSV	hsv(354, 83%, 25%)
CMYK	cmyk(0%, 82.8%, 75%, 74.9%)
CIE-LAB	lab(11.74, 25.65, 11.20)
CIE-LCH	lch(11.74, 27.99, 23.60°)
OKLab	oklab(24.91% 0.0758 0.0281)
OKLCH	oklch(24.91% 0.081 20.4)
XYZ	xyz(2.3278, 1.3671, 0.6314)
Luminance	0.0137 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400B10 #0B403B

analogous

#400B2B #400B10 #40210B

triadic

#400B10 #10400B #0B1040

tetradic

#400B10 #2B400B #0B403B #210B40

square

#400B10 #2B400B #0B403B #210B40

split-complementary

#400B10 #0B4021 #0B2B40

monochromatic

#1A0407 #1A0407 #400B10 #74141D #A81D2A

Accessibility & contrast

On white

16.49

#400B10 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#400B10 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400B10

16.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400B10	#FFFFFF	#000000	##FFFFFF
##400B10	1.00	16.49	1.27	16.49
#FFFFFF	16.49	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A1810

Deuteranopia (green-blind)

#27230E

Tritanopia (blue-blind)

#47000D

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #400b10;
/* rgb */ color: rgb(64, 11, 16);
/* oklch */ color: oklch(24.9% 0.081 20.4);

Tailwind

colors: {
  custom: {
    50: '#7a4f4e',
    500: '#400b10',
    950: '#000000',
  },
}

SCSS

$custom: #400b10;
$custom-light: #7a4f4e;
$custom-dark: #000000;

JSON

{
  "hex": "#400b10",
  "rgb": {
    "r": 64,
    "g": 11,
    "b": 16
  },
  "hsl": {
    "h": 354.34,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.24907,
    "c": 0.08086,
    "h": 20.4
  },
  "luminance": 0.01367
}

Semantic roles & 50–950 ramp

primary

#400B10

secondary

#2A7D75

accent

#EDDD3A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400B10

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

Preview Lab → · Contrast checker → · Palette generator →