#283A9B#283A9B

#283A9B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.159 H 269.6°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#283A9B
RGB	rgb(40, 58, 155)
HSL	hsl(231, 59%, 38%)
HSV	hsv(231, 74%, 61%)
CMYK	cmyk(74.2%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(29.01, 27.83, -54.94)
CIE-LCH	lch(29.01, 61.59, 296.87°)
OKLab	oklab(39.89% -0.0012 -0.1587)
OKLCH	oklch(39.89% 0.159 269.6)
XYZ	xyz(8.3025, 5.8429, 31.6942)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9B #9B8928

analogous

#28739B #283A9B #50289B

triadic

#283A9B #9B283A #3A9B28

tetradic

#283A9B #9B2873 #9B8928 #289B50

square

#283A9B #9B2873 #9B8928 #289B50

split-complementary

#283A9B #9B5028 #739B28

monochromatic

#0F163A #1B286A #283A9B #354DCB #6678D7

Accessibility & contrast

On white

9.68

#283A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#283A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9B

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9B	#FFFFFF	#000000	##FFFFFF
##283A9B	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283a9b;
/* rgb */ color: rgb(40, 58, 155);
/* oklch */ color: oklch(39.9% 0.159 269.6);

Tailwind

colors: {
  custom: {
    50: '#7370b9',
    500: '#283a9b',
    950: '#000000',
  },
}

SCSS

$custom: #283a9b;
$custom-light: #7370b9;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9b",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 230.609,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.3989,
    "c": 0.15868,
    "h": 269.6
  },
  "luminance": 0.05844
}

Semantic roles & 50–950 ramp

primary

#283A9B

secondary

#BDAF61

accent

#CA46E2

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283A9B

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

Preview Lab → · Contrast checker → · Palette generator →