#283F55#283F55

#283F55 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.048 H 248.2°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#283F55
RGB	rgb(40, 63, 85)
HSL	hsl(209, 36%, 25%)
HSV	hsv(209, 53%, 33%)
CMYK	cmyk(52.9%, 25.9%, 0%, 66.7%)
CIE-LAB	lab(25.75, -1.90, -15.99)
CIE-LCH	lch(25.75, 16.10, 263.21°)
OKLab	oklab(35.89% -0.0178 -0.0446)
OKLCH	oklch(35.89% 0.048 248.2)
XYZ	xyz(4.2917, 4.6617, 9.2662)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F55 #553E28

analogous

#285555 #283F55 #282955

triadic

#283F55 #55283F #3F5528

tetradic

#283F55 #552855 #553E28 #295528

square

#283F55 #552855 #553E28 #295528

split-complementary

#283F55 #552829 #555528

monochromatic

#0A0F15 #14202B #283F55 #3C5E7F #4F7DA8

Accessibility & contrast

On white

10.87

#283F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#283F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F55

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F55	#FFFFFF	#000000	##FFFFFF
##283F55	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#364056

Deuteranopia (green-blind)

#303B55

Tritanopia (blue-blind)

#134446

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f55;
/* rgb */ color: rgb(40, 63, 85);
/* oklch */ color: oklch(35.9% 0.048 248.2);

Tailwind

colors: {
  custom: {
    50: '#657385',
    500: '#283f55',
    950: '#000000',
  },
}

SCSS

$custom: #283f55;
$custom-light: #657385;
$custom-dark: #000000;

JSON

{
  "hex": "#283f55",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 85
  },
  "hsl": {
    "h": 209.333,
    "s": 36,
    "l": 24.51
  },
  "oklch": {
    "l": 0.35891,
    "c": 0.04805,
    "h": 248.2
  },
  "luminance": 0.04662
}

Semantic roles & 50–950 ramp

primary

#283F55

secondary

#886C51

accent

#935CCC

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F55

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

Preview Lab → · Contrast checker → · Palette generator →