#283F59#283F59

#283F59 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 36.1% C 0.054 H 252.3°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#283F59
RGB	rgb(40, 63, 89)
HSL	hsl(212, 38%, 25%)
HSV	hsv(212, 55%, 35%)
CMYK	cmyk(55.1%, 29.2%, 0%, 65.1%)
CIE-LAB	lab(25.94, -0.51, -18.30)
CIE-LCH	lch(25.94, 18.31, 268.41°)
OKLab	oklab(36.11% -0.0163 -0.0513)
OKLCH	oklch(36.11% 0.054 252.3)
XYZ	xyz(4.4551, 4.7271, 10.1269)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F59 #594228

analogous

#285759 #283F59 #2A2859

triadic

#283F59 #59283F #3F5928

tetradic

#283F59 #592857 #594228 #28592A

square

#283F59 #592857 #594228 #28592A

split-complementary

#283F59 #592A28 #575928

monochromatic

#090F15 #15212F #283F59 #3B5D83 #4E7BAD

Accessibility & contrast

On white

10.79

#283F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F59

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F59	#FFFFFF	#000000	##FFFFFF
##283F59	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#35405A

Deuteranopia (green-blind)

#2E3B58

Tritanopia (blue-blind)

#0F4548

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f59;
/* rgb */ color: rgb(40, 63, 89);
/* oklch */ color: oklch(36.1% 0.054 252.3);

Tailwind

colors: {
  custom: {
    50: '#657388',
    500: '#283f59',
    950: '#000000',
  },
}

SCSS

$custom: #283f59;
$custom-light: #657388;
$custom-dark: #000000;

JSON

{
  "hex": "#283f59",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 89
  },
  "hsl": {
    "h": 211.837,
    "s": 37.984,
    "l": 25.294
  },
  "oklch": {
    "l": 0.36108,
    "c": 0.0538,
    "h": 252.3
  },
  "luminance": 0.04727
}

Semantic roles & 50–950 ramp

primary

#283F59

secondary

#8C7051

accent

#975ACE

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F59

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

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