#283A9E#283A9E

#283A9E is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.2% C 0.163 H 269.6°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#283A9E
RGB	rgb(40, 58, 158)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 62%)
CMYK	cmyk(74.7%, 63.3%, 0%, 38%)
CIE-LAB	lab(29.27, 28.96, -56.34)
CIE-LCH	lch(29.27, 63.34, 297.20°)
OKLab	oklab(40.16% -0.0013 -0.1628)
OKLCH	oklch(40.16% 0.163 269.6)
XYZ	xyz(8.5576, 5.9449, 33.0376)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9E #9E8C28

analogous

#28759E #283A9E #51289E

triadic

#283A9E #9E283A #3A9E28

tetradic

#283A9E #9E2875 #9E8C28 #289E51

square

#283A9E #9E2875 #9E8C28 #289E51

split-complementary

#283A9E #9E5128 #759E28

monochromatic

#0F163C #1C286D #283A9E #374ECC #6879D9

Accessibility & contrast

On white

9.59

#283A9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#283A9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9E

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9E	#FFFFFF	#000000	##FFFFFF
##283A9E	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283a9e;
/* rgb */ color: rgb(40, 58, 158);
/* oklch */ color: oklch(40.2% 0.163 269.6);

Tailwind

colors: {
  custom: {
    50: '#7470bc',
    500: '#283a9e',
    950: '#000000',
  },
}

SCSS

$custom: #283a9e;
$custom-light: #7470bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9e",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 158
  },
  "hsl": {
    "h": 230.847,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40164,
    "c": 0.16278,
    "h": 269.6
  },
  "luminance": 0.05946
}

Semantic roles & 50–950 ramp

primary

#283A9E

secondary

#BFB163

accent

#CB45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283A9E

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

Preview Lab → · Contrast checker → · Palette generator →