#283A89#283A89

#283A89 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.133 H 269.4°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#283A89
RGB	rgb(40, 58, 137)
HSL	hsl(229, 55%, 35%)
HSV	hsv(229, 71%, 54%)
CMYK	cmyk(70.8%, 57.7%, 0%, 46.3%)
CIE-LAB	lab(27.53, 20.99, -46.30)
CIE-LCH	lch(27.53, 50.84, 294.39°)
OKLab	oklab(38.32% -0.0014 -0.1333)
OKLCH	oklch(38.32% 0.133 269.4)
XYZ	xyz(6.9019, 5.2827, 24.3180)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A89 #897728

analogous

#286B89 #283A89 #472889

triadic

#283A89 #89283A #3A8928

tetradic

#283A89 #89286B #897728 #288947

square

#283A89 #89286B #897728 #288947

split-complementary

#283A89 #894728 #6B8928

monochromatic

#0C122A #1A265A #283A89 #364EB8 #5C71CF

Accessibility & contrast

On white

10.21

#283A89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#283A89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A89

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A89	#FFFFFF	#000000	##FFFFFF
##283A89	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468C

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283a89;
/* rgb */ color: rgb(40, 58, 137);
/* oklch */ color: oklch(38.3% 0.133 269.4);

Tailwind

colors: {
  custom: {
    50: '#6f6fac',
    500: '#283a89',
    950: '#000000',
  },
}

SCSS

$custom: #283a89;
$custom-light: #6f6fac;
$custom-dark: #000000;

JSON

{
  "hex": "#283a89",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 137
  },
  "hsl": {
    "h": 228.866,
    "s": 54.802,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38318,
    "c": 0.13331,
    "h": 269.4
  },
  "luminance": 0.05283
}

Semantic roles & 50–950 ramp

primary

#283A89

secondary

#B5A358

accent

#C34ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A89

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

Preview Lab → · Contrast checker → · Palette generator →