#283F56#283F56

#283F56 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.049 H 249.4°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#283F56
RGB	rgb(40, 63, 86)
HSL	hsl(210, 37%, 25%)
HSV	hsv(210, 53%, 34%)
CMYK	cmyk(53.5%, 26.7%, 0%, 66.3%)
CIE-LAB	lab(25.80, -1.56, -16.57)
CIE-LCH	lch(25.80, 16.64, 264.63°)
OKLab	oklab(35.95% -0.0174 -0.0463)
OKLCH	oklch(35.95% 0.049 249.4)
XYZ	xyz(4.3317, 4.6777, 9.4769)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F56 #563F28

analogous

#285656 #283F56 #282856

triadic

#283F56 #56283F #3F5628

tetradic

#283F56 #562856 #563F28 #285628

square

#283F56 #562856 #563F28 #285628

split-complementary

#283F56 #562828 #565628

monochromatic

#0A0F15 #15202C #283F56 #3B5E80 #4F7CAA

Accessibility & contrast

On white

10.85

#283F56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283F56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F56

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F56	#FFFFFF	#000000	##FFFFFF
##283F56	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#364057

Deuteranopia (green-blind)

#303B56

Tritanopia (blue-blind)

#124447

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f56;
/* rgb */ color: rgb(40, 63, 86);
/* oklch */ color: oklch(35.9% 0.049 249.4);

Tailwind

colors: {
  custom: {
    50: '#657385',
    500: '#283f56',
    950: '#000000',
  },
}

SCSS

$custom: #283f56;
$custom-light: #657385;
$custom-dark: #000000;

JSON

{
  "hex": "#283f56",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 86
  },
  "hsl": {
    "h": 210,
    "s": 36.508,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35945,
    "c": 0.04946,
    "h": 249.4
  },
  "luminance": 0.04678
}

Semantic roles & 50–950 ramp

primary

#283F56

secondary

#896D51

accent

#945BCD

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F56

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

Preview Lab → · Contrast checker → · Palette generator →