#283BA9#283BA9

#283BA9 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.176 H 269.2°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#283BA9
RGB	rgb(40, 59, 169)
HSL	hsl(231, 62%, 41%)
HSV	hsv(231, 76%, 66%)
CMYK	cmyk(76.3%, 65.1%, 0%, 33.7%)
CIE-LAB	lab(30.50, 32.39, -60.96)
CIE-LCH	lch(30.50, 69.03, 297.98°)
OKLab	oklab(41.37% -0.0023 -0.1763)
OKLCH	oklch(41.37% 0.176 269.2)
XYZ	xyz(9.5980, 6.4426, 38.2661)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA9 #A99628

analogous

#287BA9 #283BA9 #5528A9

triadic

#283BA9 #A9283B #3BA928

tetradic

#283BA9 #A9287B #A99628 #28A955

square

#283BA9 #A9287B #A99628 #28A955

split-complementary

#283BA9 #A95528 #7BA928

monochromatic

#111846 #1C2A78 #283BA9 #3D53D1 #6F7FDD

Accessibility & contrast

On white

9.18

#283BA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#283BA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA9

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA9	#FFFFFF	#000000	##FFFFFF
##283BA9	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)

#004EAC

Deuteranopia (green-blind)

#0042A7

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283ba9;
/* rgb */ color: rgb(40, 59, 169);
/* oklch */ color: oklch(41.4% 0.176 269.2);

Tailwind

colors: {
  custom: {
    50: '#7771c4',
    500: '#283ba9',
    950: '#000000',
  },
}

SCSS

$custom: #283ba9;
$custom-light: #7771c4;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba9",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 169
  },
  "hsl": {
    "h": 231.163,
    "s": 61.722,
    "l": 40.98
  },
  "oklch": {
    "l": 0.4137,
    "c": 0.17634,
    "h": 269.2
  },
  "luminance": 0.06444
}

Semantic roles & 50–950 ramp

primary

#283BA9

secondary

#C4B669

accent

#CD43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283BA9

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

Preview Lab → · Contrast checker → · Palette generator →