#40180B#40180B

#40180B is a dark, moderate red. Relative luminance 0.018; OKLCH L 26.7% C 0.066 H 38.3°. Best body text is #FFFFFF at 15.52:1 contrast (WCAG AA passes).

Color values

HEX	#40180B
RGB	rgb(64, 24, 11)
HSL	hsl(15, 71%, 15%)
HSV	hsv(15, 83%, 25%)
CMYK	cmyk(0%, 62.5%, 82.8%, 74.9%)
CIE-LAB	lab(14.22, 18.48, 16.99)
CIE-LCH	lch(14.22, 25.10, 42.59°)
OKLab	oklab(26.75% 0.0522 0.0412)
OKLCH	oklch(26.75% 0.066 38.3)
XYZ	xyz(2.5016, 1.7677, 0.5260)
Luminance	0.0177 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40180B #0B3340

analogous

#400B19 #40180B #40330B

triadic

#40180B #0B4018 #180B40

tetradic

#40180B #19400B #0B3340 #330B40

square

#40180B #19400B #0B3340 #330B40

split-complementary

#40180B #0B4033 #0B1940

monochromatic

#1A0A04 #1A0A04 #40180B #742C14 #A83F1D

Accessibility & contrast

On white

15.52

#40180B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#40180B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40180B

15.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40180B	#FFFFFF	#000000	##FFFFFF
##40180B	1.00	15.52	1.35	15.52
#FFFFFF	15.52	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#231F09

Deuteranopia (green-blind)

#2D270A

Tritanopia (blue-blind)

#470F15

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #40180b;
/* rgb */ color: rgb(64, 24, 11);
/* oklch */ color: oklch(26.7% 0.066 38.3);

Tailwind

colors: {
  custom: {
    50: '#79564b',
    500: '#40180b',
    950: '#000000',
  },
}

SCSS

$custom: #40180b;
$custom-light: #79564b;
$custom-dark: #000000;

JSON

{
  "hex": "#40180b",
  "rgb": {
    "r": 64,
    "g": 24,
    "b": 11
  },
  "hsl": {
    "h": 14.717,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.26747,
    "c": 0.06645,
    "h": 38.3
  },
  "luminance": 0.01767
}

Semantic roles & 50–950 ramp

primary

#40180B

secondary

#2A687D

accent

#C2ED3A

background

#F7F5F4

surface

#EEE9E7

border

#C9C5C3

text

#0A0301

muted

#7C7877

Preview Lab

Preview with #40180B

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

Preview Lab → · Contrast checker → · Palette generator →