#283A9F#283A9F

#283A9F is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.164 H 269.5°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#283A9F
RGB	rgb(40, 58, 159)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 62%)
CMYK	cmyk(74.8%, 63.5%, 0%, 37.6%)
CIE-LAB	lab(29.36, 29.33, -56.80)
CIE-LCH	lch(29.36, 63.93, 297.31°)
OKLab	oklab(40.26% -0.0013 -0.1641)
OKLCH	oklch(40.26% 0.164 269.5)
XYZ	xyz(8.6440, 5.9795, 33.4928)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A9F #9F8D28

analogous

#28769F #283A9F #52289F

triadic

#283A9F #9F283A #3A9F28

tetradic

#283A9F #9F2876 #9F8D28 #289F52

square

#283A9F #9F2876 #9F8D28 #289F52

split-complementary

#283A9F #9F5228 #769F28

monochromatic

#0F163D #1C286E #283A9F #374ECD #6879D9

Accessibility & contrast

On white

9.56

#283A9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#283A9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A9F

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A9F	#FFFFFF	#000000	##FFFFFF
##283A9F	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005467

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283a9f;
/* rgb */ color: rgb(40, 58, 159);
/* oklch */ color: oklch(40.3% 0.164 269.5);

Tailwind

colors: {
  custom: {
    50: '#7470bc',
    500: '#283a9f',
    950: '#000000',
  },
}

SCSS

$custom: #283a9f;
$custom-light: #7470bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283a9f",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 159
  },
  "hsl": {
    "h": 230.924,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.40255,
    "c": 0.16415,
    "h": 269.5
  },
  "luminance": 0.0598
}

Semantic roles & 50–950 ramp

primary

#283A9F

secondary

#BFB164

accent

#CB45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283A9F

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

Preview Lab → · Contrast checker → · Palette generator →