#40171B#40171B

#40171B is a dark, moderate red. Relative luminance 0.018; OKLCH L 26.9% C 0.064 H 16.5°. Best body text is #FFFFFF at 15.48:1 contrast (WCAG AA passes).

Color values

HEX	#40171B
RGB	rgb(64, 23, 27)
HSL	hsl(354, 47%, 17%)
HSV	hsv(354, 64%, 25%)
CMYK	cmyk(0%, 64.1%, 57.8%, 74.9%)
CIE-LAB	lab(14.30, 20.41, 7.21)
CIE-LCH	lch(14.30, 21.65, 19.46°)
OKLab	oklab(26.91% 0.0614 0.0182)
OKLCH	oklch(26.91% 0.064 16.5)
XYZ	xyz(2.6188, 1.7822, 1.2428)
Luminance	0.0178 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40171B #17403C

analogous

#401730 #40171B #402817

triadic

#40171B #1B4017 #171B40

tetradic

#40171B #304017 #17403C #281740

square

#40171B #304017 #17403C #281740

split-complementary

#40171B #174028 #173040

monochromatic

#170809 #170809 #40171B #6D272E #9A3741

Accessibility & contrast

On white

15.48

#40171B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#40171B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40171B

15.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40171B	#FFFFFF	#000000	##FFFFFF
##40171B	1.00	15.48	1.36	15.48
#FFFFFF	15.48	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#201F1B

Deuteranopia (green-blind)

#2B271A

Tritanopia (blue-blind)

#461119

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #40171b;
/* rgb */ color: rgb(64, 23, 27);
/* oklch */ color: oklch(26.9% 0.064 16.5);

Tailwind

colors: {
  custom: {
    50: '#785657',
    500: '#40171b',
    950: '#000000',
  },
}

SCSS

$custom: #40171b;
$custom-light: #785657;
$custom-dark: #000000;

JSON

{
  "hex": "#40171b",
  "rgb": {
    "r": 64,
    "g": 23,
    "b": 27
  },
  "hsl": {
    "h": 354.146,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.2691,
    "c": 0.06403,
    "h": 16.5
  },
  "luminance": 0.01782
}

Semantic roles & 50–950 ramp

primary

#40171B

secondary

#3C7771

accent

#D7CA51

background

#F7F5F5

surface

#EDE9E9

border

#C8C5C5

text

#090303

muted

#7B7878

Preview Lab

Preview with #40171B

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

Preview Lab → · Contrast checker → · Palette generator →