#283E9F#283E9F

#283E9F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.159 H 268.5°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#283E9F
RGB	rgb(40, 62, 159)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 62%)
CMYK	cmyk(74.8%, 61%, 0%, 37.6%)
CIE-LAB	lab(30.40, 26.67, -55.11)
CIE-LCH	lch(30.40, 61.22, 295.82°)
OKLab	oklab(41.02% -0.0041 -0.1591)
OKLCH	oklch(41.02% 0.159 268.5)
XYZ	xyz(8.8535, 6.3986, 33.5626)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283E9F #9F8928

analogous

#287A9F #283E9F #4E289F

triadic

#283E9F #9F283E #3E9F28

tetradic

#283E9F #9F287A #9F8928 #289F4E

square

#283E9F #9F287A #9F8928 #289F4E

split-complementary

#283E9F #9F4E28 #7A9F28

monochromatic

#0F183D #1C2B6E #283E9F #3753CD #687DD9

Accessibility & contrast

On white

9.21

#283E9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#283E9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283E9F

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283E9F	#FFFFFF	#000000	##FFFFFF
##283E9F	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283e9f;
/* rgb */ color: rgb(40, 62, 159);
/* oklch */ color: oklch(41.0% 0.159 268.5);

Tailwind

colors: {
  custom: {
    50: '#7473bc',
    500: '#283e9f',
    950: '#000000',
  },
}

SCSS

$custom: #283e9f;
$custom-light: #7473bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283e9f",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 159
  },
  "hsl": {
    "h": 228.908,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.41022,
    "c": 0.15918,
    "h": 268.5
  },
  "luminance": 0.064
}

Semantic roles & 50–950 ramp

primary

#283E9F

secondary

#BFAE64

accent

#C645E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283E9F

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

Preview Lab → · Contrast checker → · Palette generator →