#283A9C#283A9C

#283A9C is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.160 H 269.6°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#283A9C
RGB	rgb(40, 58, 156)
HSL	hsl(231, 59%, 38%)
HSV	hsv(231, 74%, 61%)
CMYK	cmyk(74.4%, 62.8%, 0%, 38.8%)
CIE-LAB	lab(29.10, 28.21, -55.41)
CIE-LCH	lch(29.10, 62.17, 296.98°)
OKLab	oklab(39.98% -0.0012 -0.16)
OKLCH	oklch(39.98% 0.16 269.6)
XYZ	xyz(8.3868, 5.8766, 32.1383)
Luminance	0.0588 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9C #9C8A28

analogous

#28749C #283A9C #50289C

triadic

#283A9C #9C283A #3A9C28

tetradic

#283A9C #9C2874 #9C8A28 #289C50

square

#283A9C #9C2874 #9C8A28 #289C50

split-complementary

#283A9C #9C5028 #749C28

monochromatic

#0F163B #1C286B #283A9C #364DCB #6778D8

Accessibility & contrast

On white

9.65

#283A9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#283A9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9C

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9C	#FFFFFF	#000000	##FFFFFF
##283A9C	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9F

Deuteranopia (green-blind)

#003F9A

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283a9c;
/* rgb */ color: rgb(40, 58, 156);
/* oklch */ color: oklch(40.0% 0.160 269.6);

Tailwind

colors: {
  custom: {
    50: '#7370ba',
    500: '#283a9c',
    950: '#000000',
  },
}

SCSS

$custom: #283a9c;
$custom-light: #7370ba;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9c",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 156
  },
  "hsl": {
    "h": 230.69,
    "s": 59.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.39981,
    "c": 0.16005,
    "h": 269.6
  },
  "luminance": 0.05878
}

Semantic roles & 50–950 ramp

primary

#283A9C

secondary

#BEB062

accent

#CA45E2

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283A9C

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

Preview Lab → · Contrast checker → · Palette generator →