#283689#283689

#283689 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.139 H 270.9°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#283689
RGB	rgb(40, 54, 137)
HSL	hsl(231, 55%, 35%)
HSV	hsv(231, 71%, 54%)
CMYK	cmyk(70.8%, 60.6%, 0%, 46.3%)
CIE-LAB	lab(26.43, 23.73, -48.08)
CIE-LCH	lch(26.43, 53.61, 296.27°)
OKLab	oklab(37.5% 0.0021 -0.1386)
OKLCH	oklch(37.5% 0.139 270.9)
XYZ	xyz(6.7081, 4.8949, 24.2534)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283689 #897B28

analogous

#286789 #283689 #4A2889

triadic

#283689 #892836 #368928

tetradic

#283689 #892867 #897B28 #28894A

square

#283689 #892867 #897B28 #28894A

split-complementary

#283689 #894A28 #678928

monochromatic

#0C112A #1A235A #283689 #3649B8 #5C6DCF

Accessibility & contrast

On white

10.61

#283689 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#283689 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283689

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283689	#FFFFFF	#000000	##FFFFFF
##283689	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438C

Deuteranopia (green-blind)

#003A87

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283689;
/* rgb */ color: rgb(40, 54, 137);
/* oklch */ color: oklch(37.5% 0.139 270.9);

Tailwind

colors: {
  custom: {
    50: '#6f6cac',
    500: '#283689',
    950: '#000000',
  },
}

SCSS

$custom: #283689;
$custom-light: #6f6cac;
$custom-dark: #000000;

JSON

{
  "hex": "#283689",
  "rgb": {
    "r": 40,
    "g": 54,
    "b": 137
  },
  "hsl": {
    "h": 231.34,
    "s": 54.802,
    "l": 34.706
  },
  "oklch": {
    "l": 0.37503,
    "c": 0.1386,
    "h": 270.9
  },
  "luminance": 0.04896
}

Semantic roles & 50–950 ramp

primary

#283689

secondary

#B5A758

accent

#C94ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283689

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

Preview Lab → · Contrast checker → · Palette generator →