#283A66#283A66

#283A66 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.7% C 0.080 H 265.7°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#283A66
RGB	rgb(40, 58, 102)
HSL	hsl(223, 44%, 28%)
HSV	hsv(223, 61%, 40%)
CMYK	cmyk(60.8%, 43.1%, 0%, 60%)
CIE-LAB	lab(25.06, 7.63, -28.11)
CIE-LCH	lch(25.06, 29.13, 285.18°)
OKLab	oklab(35.66% -0.006 -0.0798)
OKLCH	oklch(35.66% 0.08 265.7)
XYZ	xyz(4.7856, 4.4362, 13.1719)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A66 #665428

analogous

#285966 #283A66 #352866

triadic

#283A66 #66283A #3A6628

tetradic

#283A66 #662859 #665428 #286635

square

#283A66 #662859 #665428 #286635

split-complementary

#283A66 #663528 #596628

monochromatic

#090C16 #17213A #283A66 #395392 #4F6EBA

Accessibility & contrast

On white

11.13

#283A66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#283A66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A66

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A66	#FFFFFF	#000000	##FFFFFF
##283A66	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273E68

Deuteranopia (green-blind)

#1F3965

Tritanopia (blue-blind)

#00444B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283a66;
/* rgb */ color: rgb(40, 58, 102);
/* oklch */ color: oklch(35.7% 0.080 265.7);

Tailwind

colors: {
  custom: {
    50: '#686f92',
    500: '#283a66',
    950: '#000000',
  },
}

SCSS

$custom: #283a66;
$custom-light: #686f92;
$custom-dark: #000000;

JSON

{
  "hex": "#283a66",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 102
  },
  "hsl": {
    "h": 222.581,
    "s": 43.662,
    "l": 27.843
  },
  "oklch": {
    "l": 0.3566,
    "c": 0.08007,
    "h": 265.7
  },
  "luminance": 0.04437
}

Semantic roles & 50–950 ramp

primary

#283A66

secondary

#998451

accent

#AF54D3

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #283A66

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

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