#283640#283640

#283640 is a dark, muted cyan. Relative luminance 0.035; OKLCH L 32.5% C 0.026 H 239.6°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX	#283640
RGB	rgb(40, 54, 64)
HSL	hsl(205, 23%, 20%)
HSV	hsv(205, 38%, 25%)
CMYK	cmyk(37.5%, 15.6%, 0%, 74.9%)
CIE-LAB	lab(21.80, -2.84, -8.10)
CIE-LCH	lch(21.80, 8.58, 250.70°)
OKLab	oklab(32.47% -0.013 -0.0222)
OKLCH	oklch(32.47% 0.026 239.6)
XYZ	xyz(3.1194, 3.4595, 5.3529)
Luminance	0.0346 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283640 #403228

analogous

#28403E #283640 #282A40

triadic

#283640 #402836 #364028

tetradic

#283640 #3E2840 #403228 #2A4028

square

#283640 #3E2840 #403228 #2A4028

split-complementary

#283640 #40282A #403E28

monochromatic

#0C1013 #10161A #283640 #405666 #57768B

Accessibility & contrast

On white

12.41

#283640 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#283640 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283640

12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283640	#FFFFFF	#000000	##FFFFFF
##283640	1.00	12.41	1.69	12.41
#FFFFFF	12.41	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323641

Deuteranopia (green-blind)

#2E3340

Tritanopia (blue-blind)

#203939

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #283640;
/* rgb */ color: rgb(40, 54, 64);
/* oklch */ color: oklch(32.5% 0.026 239.6);

Tailwind

colors: {
  custom: {
    50: '#636d74',
    500: '#283640',
    950: '#000000',
  },
}

SCSS

$custom: #283640;
$custom-light: #636d74;
$custom-dark: #000000;

JSON

{
  "hex": "#283640",
  "rgb": {
    "r": 40,
    "g": 54,
    "b": 64
  },
  "hsl": {
    "h": 205,
    "s": 23.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.32467,
    "c": 0.02576,
    "h": 239.6
  },
  "luminance": 0.0346
}

Semantic roles & 50–950 ramp

primary

#283640

secondary

#725F52

accent

#8D68C0

background

#F5F6F7

surface

#EAEBED

border

#C6C6C8

text

#050708

muted

#797A7B

Preview Lab

Preview with #283640

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

Preview Lab → · Contrast checker → · Palette generator →