#283DA1#283DA1

#283DA1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.163 H 268.8°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#283DA1
RGB	rgb(40, 61, 161)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 63%)
CMYK	cmyk(75.2%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(30.31, 28.09, -56.47)
CIE-LCH	lch(30.31, 63.07, 296.45°)
OKLab	oklab(41.01% -0.0034 -0.1631)
OKLCH	oklch(41.01% 0.163 268.8)
XYZ	xyz(8.9746, 6.3609, 34.4661)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA1 #A18C28

analogous

#287AA1 #283DA1 #5028A1

triadic

#283DA1 #A1283D #3DA128

tetradic

#283DA1 #A1287A #A18C28 #28A150

square

#283DA1 #A1287A #A18C28 #28A150

split-complementary

#283DA1 #A15028 #7AA128

monochromatic

#10183F #1C2A70 #283DA1 #3952CE #6A7DDA

Accessibility & contrast

On white

9.24

#283DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#283DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA1

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA1	#FFFFFF	#000000	##FFFFFF
##283DA1	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00429F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283da1;
/* rgb */ color: rgb(40, 61, 161);
/* oklch */ color: oklch(41.0% 0.163 268.8);

Tailwind

colors: {
  custom: {
    50: '#7472be',
    500: '#283da1',
    950: '#000000',
  },
}

SCSS

$custom: #283da1;
$custom-light: #7472be;
$custom-dark: #000000;

JSON

{
  "hex": "#283da1",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 229.587,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41007,
    "c": 0.16317,
    "h": 268.8
  },
  "luminance": 0.06362
}

Semantic roles & 50–950 ramp

primary

#283DA1

secondary

#C0B065

accent

#C844E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283DA1

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

Preview Lab → · Contrast checker → · Palette generator →