#283240#283240

#283240 is a dark, muted blue. Relative luminance 0.031; OKLCH L 31.4% C 0.029 H 256.8°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#283240
RGB	rgb(40, 50, 64)
HSL	hsl(215, 23%, 20%)
HSV	hsv(215, 38%, 25%)
CMYK	cmyk(37.5%, 21.9%, 0%, 74.9%)
CIE-LAB	lab(20.45, -0.14, -10.15)
CIE-LCH	lch(20.45, 10.15, 269.20°)
OKLab	oklab(31.41% -0.0065 -0.028)
OKLCH	oklch(31.41% 0.029 256.8)
XYZ	xyz(2.9408, 3.1024, 5.2934)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283240 #403628

analogous

#283E40 #283240 #2A2840

triadic

#283240 #402832 #324028

tetradic

#283240 #40283E #403628 #28402A

square

#283240 #40283E #403628 #28402A

split-complementary

#283240 #402A28 #3E4028

monochromatic

#0C0F13 #10151A #283240 #404F66 #576D8B

Accessibility & contrast

On white

12.96

#283240 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#283240 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283240

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283240	#FFFFFF	#000000	##FFFFFF
##283240	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3341

Deuteranopia (green-blind)

#2A3040

Tritanopia (blue-blind)

#213537

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #283240;
/* rgb */ color: rgb(40, 50, 64);
/* oklch */ color: oklch(31.4% 0.029 256.8);

Tailwind

colors: {
  custom: {
    50: '#626974',
    500: '#283240',
    950: '#000000',
  },
}

SCSS

$custom: #283240;
$custom-light: #626974;
$custom-dark: #000000;

JSON

{
  "hex": "#283240",
  "rgb": {
    "r": 40,
    "g": 50,
    "b": 64
  },
  "hsl": {
    "h": 215,
    "s": 23.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.31406,
    "c": 0.02872,
    "h": 256.8
  },
  "luminance": 0.03102
}

Semantic roles & 50–950 ramp

primary

#283240

secondary

#726552

accent

#9B68C0

background

#F5F6F7

surface

#EAEBED

border

#C6C6C8

text

#050608

muted

#797A7B

Preview Lab

Preview with #283240

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

Preview Lab → · Contrast checker → · Palette generator →