#283C88#283C88

#283C88 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.129 H 268.6°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#283C88
RGB	rgb(40, 60, 136)
HSL	hsl(228, 55%, 35%)
HSV	hsv(228, 71%, 53%)
CMYK	cmyk(70.6%, 55.9%, 0%, 46.7%)
CIE-LAB	lab(28.01, 19.23, -44.90)
CIE-LCH	lch(28.01, 48.85, 293.19°)
OKLab	oklab(38.66% -0.0032 -0.1292)
OKLCH	oklch(38.66% 0.129 268.6)
XYZ	xyz(6.9333, 5.4597, 23.9762)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C88 #887428

analogous

#286C88 #283C88 #442888

triadic

#283C88 #88283C #3C8828

tetradic

#283C88 #88286C #887428 #288844

square

#283C88 #88286C #887428 #288844

split-complementary

#283C88 #884428 #6C8828

monochromatic

#0C1229 #1A2759 #283C88 #3651B7 #5B74CF

Accessibility & contrast

On white

10.04

#283C88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283C88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C88

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C88	#FFFFFF	#000000	##FFFFFF
##283C88	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01478B

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283c88;
/* rgb */ color: rgb(40, 60, 136);
/* oklch */ color: oklch(38.7% 0.129 268.6);

Tailwind

colors: {
  custom: {
    50: '#6f71ab',
    500: '#283c88',
    950: '#000000',
  },
}

SCSS

$custom: #283c88;
$custom-light: #6f71ab;
$custom-dark: #000000;

JSON

{
  "hex": "#283c88",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 136
  },
  "hsl": {
    "h": 227.5,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38655,
    "c": 0.1292,
    "h": 268.6
  },
  "luminance": 0.0546
}

Semantic roles & 50–950 ramp

primary

#283C88

secondary

#B4A158

accent

#BF4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283C88

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

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