#283A9D#283A9D

#283A9D is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.1% C 0.161 H 269.6°. Best body text is #FFFFFF at 9.62:1 contrast (WCAG AA passes).

Color values

HEX	#283A9D
RGB	rgb(40, 58, 157)
HSL	hsl(231, 59%, 39%)
HSV	hsv(231, 75%, 62%)
CMYK	cmyk(74.5%, 63.1%, 0%, 38.4%)
CIE-LAB	lab(29.19, 28.58, -55.87)
CIE-LCH	lch(29.19, 62.76, 297.09°)
OKLab	oklab(40.07% -0.0012 -0.1614)
OKLCH	oklch(40.07% 0.161 269.6)
XYZ	xyz(8.4718, 5.9107, 32.5861)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9D #9D8B28

analogous

#28749D #283A9D #50289D

triadic

#283A9D #9D283A #3A9D28

tetradic

#283A9D #9D2874 #9D8B28 #289D50

square

#283A9D #9D2874 #9D8B28 #289D50

split-complementary

#283A9D #9D5028 #749D28

monochromatic

#0F163B #1C286C #283A9D #364DCC #6779D8

Accessibility & contrast

On white

9.62

#283A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#283A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9D

9.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9D	#FFFFFF	#000000	##FFFFFF
##283A9D	1.00	9.62	2.18	9.62
#FFFFFF	9.62	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA0

Deuteranopia (green-blind)

#003F9B

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283a9d;
/* rgb */ color: rgb(40, 58, 157);
/* oklch */ color: oklch(40.1% 0.161 269.6);

Tailwind

colors: {
  custom: {
    50: '#7470bb',
    500: '#283a9d',
    950: '#000000',
  },
}

SCSS

$custom: #283a9d;
$custom-light: #7470bb;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9d",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 157
  },
  "hsl": {
    "h": 230.769,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40072,
    "c": 0.16142,
    "h": 269.6
  },
  "luminance": 0.05912
}

Semantic roles & 50–950 ramp

primary

#283A9D

secondary

#BEB062

accent

#CA45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283A9D

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

Preview Lab → · Contrast checker → · Palette generator →