#283F5C#283F5C

#283F5C is a dark, muted cyan. Relative luminance 0.048; OKLCH L 36.3% C 0.058 H 254.8°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#283F5C
RGB	rgb(40, 63, 92)
HSL	hsl(213, 39%, 26%)
HSV	hsv(213, 57%, 36%)
CMYK	cmyk(56.5%, 31.5%, 0%, 63.9%)
CIE-LAB	lab(26.09, 0.56, -20.02)
CIE-LCH	lch(26.09, 20.02, 271.59°)
OKLab	oklab(36.28% -0.0153 -0.0562)
OKLCH	oklch(36.28% 0.058 254.8)
XYZ	xyz(4.5837, 4.7785, 10.8039)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F5C #5C4528

analogous

#28595C #283F5C #2B285C

triadic

#283F5C #5C283F #3F5C28

tetradic

#283F5C #5C2859 #5C4528 #285C2B

square

#283F5C #5C2859 #5C4528 #285C2B

split-complementary

#283F5C #5C2B28 #595C28

monochromatic

#090F15 #152231 #283F5C #3B5C87 #4D79B1

Accessibility & contrast

On white

10.74

#283F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#283F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F5C

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F5C	#FFFFFF	#000000	##FFFFFF
##283F5C	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33415D

Deuteranopia (green-blind)

#2D3B5B

Tritanopia (blue-blind)

#0C4649

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283f5c;
/* rgb */ color: rgb(40, 63, 92);
/* oklch */ color: oklch(36.3% 0.058 254.8);

Tailwind

colors: {
  custom: {
    50: '#66738a',
    500: '#283f5c',
    950: '#000000',
  },
}

SCSS

$custom: #283f5c;
$custom-light: #66738a;
$custom-dark: #000000;

JSON

{
  "hex": "#283f5c",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 92
  },
  "hsl": {
    "h": 213.462,
    "s": 39.394,
    "l": 25.882
  },
  "oklch": {
    "l": 0.36277,
    "c": 0.05826,
    "h": 254.8
  },
  "luminance": 0.04779
}

Semantic roles & 50–950 ramp

primary

#283F5C

secondary

#8F7351

accent

#9B59CF

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F5C

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

Preview Lab → · Contrast checker → · Palette generator →