#283EA1#283EA1

#283EA1 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.2% C 0.162 H 268.5°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#283EA1
RGB	rgb(40, 62, 161)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 63%)
CMYK	cmyk(75.2%, 61.5%, 0%, 36.9%)
CIE-LAB	lab(30.57, 27.43, -56.04)
CIE-LCH	lch(30.57, 62.39, 296.08°)
OKLab	oklab(41.2% -0.0041 -0.1619)
OKLCH	oklch(41.2% 0.162 268.5)
XYZ	xyz(9.0285, 6.4686, 34.4840)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EA1 #A18B28

analogous

#287BA1 #283EA1 #4F28A1

triadic

#283EA1 #A1283E #3EA128

tetradic

#283EA1 #A1287B #A18B28 #28A14F

square

#283EA1 #A1287B #A18B28 #28A14F

split-complementary

#283EA1 #A14F28 #7BA128

monochromatic

#10183F #1C2B70 #283EA1 #3954CE #6A7EDA

Accessibility & contrast

On white

9.15

#283EA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#283EA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EA1

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EA1	#FFFFFF	#000000	##FFFFFF
##283EA1	1.00	9.15	2.29	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00429F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283ea1;
/* rgb */ color: rgb(40, 62, 161);
/* oklch */ color: oklch(41.2% 0.162 268.5);

Tailwind

colors: {
  custom: {
    50: '#7473be',
    500: '#283ea1',
    950: '#000000',
  },
}

SCSS

$custom: #283ea1;
$custom-light: #7473be;
$custom-dark: #000000;

JSON

{
  "hex": "#283ea1",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 161
  },
  "hsl": {
    "h": 229.091,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.412,
    "c": 0.16192,
    "h": 268.5
  },
  "luminance": 0.0647
}

Semantic roles & 50–950 ramp

primary

#283EA1

secondary

#C0B065

accent

#C644E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283EA1

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

Preview Lab → · Contrast checker → · Palette generator →