#283F57#283F57

#283F57 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 36.0% C 0.051 H 250.4°. Best body text is #FFFFFF at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#283F57
RGB	rgb(40, 63, 87)
HSL	hsl(211, 37%, 25%)
HSV	hsv(211, 54%, 34%)
CMYK	cmyk(54%, 27.6%, 0%, 65.9%)
CIE-LAB	lab(25.84, -1.21, -17.15)
CIE-LCH	lch(25.84, 17.19, 265.97°)
OKLab	oklab(36% -0.0171 -0.0479)
OKLCH	oklch(36% 0.051 250.4)
XYZ	xyz(4.3723, 4.6939, 9.6906)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F57 #574028

analogous

#285757 #283F57 #282857

triadic

#283F57 #57283F #3F5728

tetradic

#283F57 #572857 #574028 #285728

square

#283F57 #572857 #574028 #285728

split-complementary

#283F57 #572828 #575728

monochromatic

#0A0F15 #15212D #283F57 #3B5D81 #4F7CAB

Accessibility & contrast

On white

10.83

#283F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F57

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F57	#FFFFFF	#000000	##FFFFFF
##283F57	1.00	10.83	1.94	10.83
#FFFFFF	10.83	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354058

Deuteranopia (green-blind)

#2F3B57

Tritanopia (blue-blind)

#114547

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f57;
/* rgb */ color: rgb(40, 63, 87);
/* oklch */ color: oklch(36.0% 0.051 250.4);

Tailwind

colors: {
  custom: {
    50: '#657386',
    500: '#283f57',
    950: '#000000',
  },
}

SCSS

$custom: #283f57;
$custom-light: #657386;
$custom-dark: #000000;

JSON

{
  "hex": "#283f57",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 87
  },
  "hsl": {
    "h": 210.638,
    "s": 37.008,
    "l": 24.902
  },
  "oklch": {
    "l": 0.35999,
    "c": 0.05089,
    "h": 250.4
  },
  "luminance": 0.04694
}

Semantic roles & 50–950 ramp

primary

#283F57

secondary

#8A6E51

accent

#955BCD

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F57

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

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