#283B76#283B76

#283B76 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.104 H 267.7°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#283B76
RGB	rgb(40, 59, 118)
HSL	hsl(225, 49%, 31%)
HSV	hsv(225, 66%, 46%)
CMYK	cmyk(66.1%, 50%, 0%, 53.7%)
CIE-LAB	lab(26.41, 13.00, -36.19)
CIE-LCH	lch(26.41, 38.46, 289.76°)
OKLab	oklab(37.03% -0.0041 -0.1036)
OKLCH	oklch(37.03% 0.104 267.7)
XYZ	xyz(5.7079, 4.8865, 17.7784)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B76 #766328

analogous

#286276 #283B76 #3C2876

triadic

#283B76 #76283B #3B7628

tetradic

#283B76 #762862 #766328 #28763C

square

#283B76 #762862 #766328 #28763C

split-complementary

#283B76 #763C28 #627628

monochromatic

#090D1B #192448 #283B76 #3752A4 #546FC5

Accessibility & contrast

On white

10.62

#283B76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#283B76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B76

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B76	#FFFFFF	#000000	##FFFFFF
##283B76	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4278

Deuteranopia (green-blind)

#0D3B75

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b76;
/* rgb */ color: rgb(40, 59, 118);
/* oklch */ color: oklch(37.0% 0.104 267.7);

Tailwind

colors: {
  custom: {
    50: '#6b709e',
    500: '#283b76',
    950: '#000000',
  },
}

SCSS

$custom: #283b76;
$custom-light: #6b709e;
$custom-dark: #000000;

JSON

{
  "hex": "#283b76",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 118
  },
  "hsl": {
    "h": 225.385,
    "s": 49.367,
    "l": 30.98
  },
  "oklch": {
    "l": 0.37028,
    "c": 0.10364,
    "h": 267.7
  },
  "luminance": 0.04887
}

Semantic roles & 50–950 ramp

primary

#283B76

secondary

#A89352

accent

#B74FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B76

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

Preview Lab → · Contrast checker → · Palette generator →