#283A8E#283A8E

#283A8E is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.141 H 269.5°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#283A8E
RGB	rgb(40, 58, 142)
HSL	hsl(229, 56%, 36%)
HSV	hsv(229, 72%, 56%)
CMYK	cmyk(71.8%, 59.2%, 0%, 44.3%)
CIE-LAB	lab(27.92, 22.90, -48.74)
CIE-LCH	lch(27.92, 53.86, 295.17°)
OKLab	oklab(38.74% -0.0012 -0.1405)
OKLCH	oklch(38.74% 0.141 269.5)
XYZ	xyz(7.2689, 5.4295, 26.2509)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A8E #8E7C28

analogous

#286D8E #283A8E #49288E

triadic

#283A8E #8E283A #3A8E28

tetradic

#283A8E #8E286D #8E7C28 #288E49

square

#283A8E #8E286D #8E7C28 #288E49

split-complementary

#283A8E #8E4928 #6D8E28

monochromatic

#0D132F #1B265E #283A8E #354EBE #5F73D2

Accessibility & contrast

On white

10.07

#283A8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#283A8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A8E

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A8E	#FFFFFF	#000000	##FFFFFF
##283A8E	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283a8e;
/* rgb */ color: rgb(40, 58, 142);
/* oklch */ color: oklch(38.7% 0.141 269.5);

Tailwind

colors: {
  custom: {
    50: '#706fb0',
    500: '#283a8e',
    950: '#000000',
  },
}

SCSS

$custom: #283a8e;
$custom-light: #706fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#283a8e",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 142
  },
  "hsl": {
    "h": 229.412,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38743,
    "c": 0.1405,
    "h": 269.5
  },
  "luminance": 0.0543
}

Semantic roles & 50–950 ramp

primary

#283A8E

secondary

#B7A75B

accent

#C548DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A8E

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

Preview Lab → · Contrast checker → · Palette generator →