#283A9A#283A9A

#283A9A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.8% C 0.157 H 269.6°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#283A9A
RGB	rgb(40, 58, 154)
HSL	hsl(231, 59%, 38%)
HSV	hsv(231, 74%, 60%)
CMYK	cmyk(74%, 62.3%, 0%, 39.6%)
CIE-LAB	lab(28.93, 27.45, -54.47)
CIE-LCH	lch(28.93, 61.00, 296.75°)
OKLab	oklab(39.8% -0.0012 -0.1573)
OKLCH	oklch(39.8% 0.157 269.6)
XYZ	xyz(8.2189, 5.8095, 31.2538)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9A #9A8828

analogous

#28739A #283A9A #4F289A

triadic

#283A9A #9A283A #3A9A28

tetradic

#283A9A #9A2873 #9A8828 #289A4F

square

#283A9A #9A2873 #9A8828 #289A4F

split-complementary

#283A9A #9A4F28 #739A28

monochromatic

#0F1539 #1B2869 #283A9A #354CCA #6577D7

Accessibility & contrast

On white

9.71

#283A9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#283A9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9A

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9A	#FFFFFF	#000000	##FFFFFF
##283A9A	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9D

Deuteranopia (green-blind)

#003F98

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283a9a;
/* rgb */ color: rgb(40, 58, 154);
/* oklch */ color: oklch(39.8% 0.157 269.6);

Tailwind

colors: {
  custom: {
    50: '#7370b9',
    500: '#283a9a',
    950: '#000000',
  },
}

SCSS

$custom: #283a9a;
$custom-light: #7370b9;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9a",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 154
  },
  "hsl": {
    "h": 230.526,
    "s": 58.763,
    "l": 38.039
  },
  "oklch": {
    "l": 0.398,
    "c": 0.1573,
    "h": 269.6
  },
  "luminance": 0.0581
}

Semantic roles & 50–950 ramp

primary

#283A9A

secondary

#BDAE61

accent

#C946E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283A9A

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

Preview Lab → · Contrast checker → · Palette generator →