#283D66#283D66

#283D66 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.076 H 262.7°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#283D66
RGB	rgb(40, 61, 102)
HSL	hsl(220, 44%, 28%)
HSV	hsv(220, 61%, 40%)
CMYK	cmyk(60.8%, 40.2%, 0%, 60%)
CIE-LAB	lab(26.00, 5.56, -26.63)
CIE-LCH	lch(26.00, 27.20, 281.80°)
OKLab	oklab(36.39% -0.0097 -0.0754)
OKLCH	oklch(36.39% 0.076 262.7)
XYZ	xyz(4.9413, 4.7475, 13.2238)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D66 #665128

analogous

#285C66 #283D66 #322866

triadic

#283D66 #66283D #3D6628

tetradic

#283D66 #66285C #665128 #286632

square

#283D66 #66285C #665128 #286632

split-complementary

#283D66 #663228 #5C6628

monochromatic

#090D16 #17233A #283D66 #395792 #4F73BA

Accessibility & contrast

On white

10.77

#283D66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283D66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D66

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D66	#FFFFFF	#000000	##FFFFFF
##283D66	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4168

Deuteranopia (green-blind)

#243B65

Tritanopia (blue-blind)

#00464C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283d66;
/* rgb */ color: rgb(40, 61, 102);
/* oklch */ color: oklch(36.4% 0.076 262.7);

Tailwind

colors: {
  custom: {
    50: '#687292',
    500: '#283d66',
    950: '#000000',
  },
}

SCSS

$custom: #283d66;
$custom-light: #687292;
$custom-dark: #000000;

JSON

{
  "hex": "#283d66",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 102
  },
  "hsl": {
    "h": 219.677,
    "s": 43.662,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36386,
    "c": 0.07607,
    "h": 262.7
  },
  "luminance": 0.04748
}

Semantic roles & 50–950 ramp

primary

#283D66

secondary

#998051

accent

#A854D3

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #283D66

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

Preview Lab → · Contrast checker → · Palette generator →