#283EA0#283EA0

#283EA0 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.161 H 268.5°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#283EA0
RGB	rgb(40, 62, 160)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 63%)
CMYK	cmyk(75%, 61.2%, 0%, 37.3%)
CIE-LAB	lab(30.48, 27.05, -55.58)
CIE-LCH	lch(30.48, 61.81, 295.95°)
OKLab	oklab(41.11% -0.0041 -0.1605)
OKLCH	oklch(41.11% 0.161 268.5)
XYZ	xyz(8.9407, 6.4335, 34.0215)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EA0 #A08A28

analogous

#287AA0 #283EA0 #4E28A0

triadic

#283EA0 #A0283E #3EA028

tetradic

#283EA0 #A0287A #A08A28 #28A04E

square

#283EA0 #A0287A #A08A28 #28A04E

split-complementary

#283EA0 #A04E28 #7AA028

monochromatic

#10183E #1C2B6F #283EA0 #3853CD #697ED9

Accessibility & contrast

On white

9.18

#283EA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#283EA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EA0

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EA0	#FFFFFF	#000000	##FFFFFF
##283EA0	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA3

Deuteranopia (green-blind)

#00429E

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283ea0;
/* rgb */ color: rgb(40, 62, 160);
/* oklch */ color: oklch(41.1% 0.161 268.5);

Tailwind

colors: {
  custom: {
    50: '#7473bd',
    500: '#283ea0',
    950: '#000000',
  },
}

SCSS

$custom: #283ea0;
$custom-light: #7473bd;
$custom-dark: #000000;

JSON

{
  "hex": "#283ea0",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 160
  },
  "hsl": {
    "h": 229,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.41111,
    "c": 0.16055,
    "h": 268.5
  },
  "luminance": 0.06434
}

Semantic roles & 50–950 ramp

primary

#283EA0

secondary

#C0AF64

accent

#C645E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283EA0

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

Preview Lab → · Contrast checker → · Palette generator →