#283799#283799

#283799 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.1% C 0.160 H 270.4°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#283799
RGB	rgb(40, 55, 153)
HSL	hsl(232, 59%, 38%)
HSV	hsv(232, 74%, 60%)
CMYK	cmyk(73.9%, 64.1%, 0%, 40%)
CIE-LAB	lab(28.07, 29.08, -55.26)
CIE-LCH	lch(28.07, 62.45, 297.75°)
OKLab	oklab(39.14% 0.001 -0.1597)
OKLCH	oklch(39.14% 0.16 270.4)
XYZ	xyz(7.9891, 5.4826, 30.7680)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283799 #998A28

analogous

#287099 #283799 #512899

triadic

#283799 #992837 #379928

tetradic

#283799 #992870 #998A28 #289951

square

#283799 #992870 #998A28 #289951

split-complementary

#283799 #995128 #709928

monochromatic

#0F1438 #1B2668 #283799 #3548CA #6574D7

Accessibility & contrast

On white

10.02

#283799 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#283799 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283799

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283799	#FFFFFF	#000000	##FFFFFF
##283799	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489C

Deuteranopia (green-blind)

#003D97

Tritanopia (blue-blind)

#005062

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283799;
/* rgb */ color: rgb(40, 55, 153);
/* oklch */ color: oklch(39.1% 0.160 270.4);

Tailwind

colors: {
  custom: {
    50: '#736db8',
    500: '#283799',
    950: '#000000',
  },
}

SCSS

$custom: #283799;
$custom-light: #736db8;
$custom-dark: #000000;

JSON

{
  "hex": "#283799",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 153
  },
  "hsl": {
    "h": 232.035,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39139,
    "c": 0.15966,
    "h": 270.4
  },
  "luminance": 0.05483
}

Semantic roles & 50–950 ramp

primary

#283799

secondary

#BDB060

accent

#CD46E2

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283799

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

Preview Lab → · Contrast checker → · Palette generator →