#283C8D#283C8D

#283C8D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.136 H 268.8°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#283C8D
RGB	rgb(40, 60, 141)
HSL	hsl(228, 56%, 35%)
HSV	hsv(228, 72%, 55%)
CMYK	cmyk(71.6%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(28.39, 21.15, -47.37)
CIE-LCH	lch(28.39, 51.88, 294.07°)
OKLab	oklab(39.07% -0.003 -0.1364)
OKLCH	oklch(39.07% 0.136 268.8)
XYZ	xyz(7.2970, 5.6052, 25.8915)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C8D #8D7928

analogous

#286E8D #283C8D #46288D

triadic

#283C8D #8D283C #3C8D28

tetradic

#283C8D #8D286E #8D7928 #288D46

square

#283C8D #8D286E #8D7928 #288D46

split-complementary

#283C8D #8D4628 #6E8D28

monochromatic

#0D132E #1A285D #283C8D #3650BD #5E75D1

Accessibility & contrast

On white

9.90

#283C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#283C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C8D

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C8D	#FFFFFF	#000000	##FFFFFF
##283C8D	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003F8B

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283c8d;
/* rgb */ color: rgb(40, 60, 141);
/* oklch */ color: oklch(39.1% 0.136 268.8);

Tailwind

colors: {
  custom: {
    50: '#7071af',
    500: '#283c8d',
    950: '#000000',
  },
}

SCSS

$custom: #283c8d;
$custom-light: #7071af;
$custom-dark: #000000;

JSON

{
  "hex": "#283c8d",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 228.119,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.39069,
    "c": 0.13644,
    "h": 268.8
  },
  "luminance": 0.05606
}

Semantic roles & 50–950 ramp

primary

#283C8D

secondary

#B7A45A

accent

#C149DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283C8D

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

Preview Lab → · Contrast checker → · Palette generator →