#283D91#283D91

#283D91 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.141 H 268.5°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#283D91
RGB	rgb(40, 61, 145)
HSL	hsl(228, 57%, 36%)
HSV	hsv(228, 72%, 57%)
CMYK	cmyk(72.4%, 57.9%, 0%, 43.1%)
CIE-LAB	lab(28.99, 22.01, -48.87)
CIE-LCH	lch(28.99, 53.59, 294.24°)
OKLab	oklab(39.61% -0.0036 -0.1408)
OKLCH	oklch(39.61% 0.141 268.5)
XYZ	xyz(7.6529, 5.8322, 27.5050)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D91 #917C28

analogous

#287291 #283D91 #482891

triadic

#283D91 #91283D #3D9128

tetradic

#283D91 #912872 #917C28 #289148

square

#283D91 #912872 #917C28 #289148

split-complementary

#283D91 #914828 #729128

monochromatic

#0E1531 #1B2961 #283D91 #3551C1 #6077D3

Accessibility & contrast

On white

9.69

#283D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#283D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D91

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D91	#FFFFFF	#000000	##FFFFFF
##283D91	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#00408F

Tritanopia (blue-blind)

#005261

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283d91;
/* rgb */ color: rgb(40, 61, 145);
/* oklch */ color: oklch(39.6% 0.141 268.5);

Tailwind

colors: {
  custom: {
    50: '#7172b2',
    500: '#283d91',
    950: '#000000',
  },
}

SCSS

$custom: #283d91;
$custom-light: #7172b2;
$custom-dark: #000000;

JSON

{
  "hex": "#283d91",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 145
  },
  "hsl": {
    "h": 228,
    "s": 56.757,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39611,
    "c": 0.14086,
    "h": 268.5
  },
  "luminance": 0.05833
}

Semantic roles & 50–950 ramp

primary

#283D91

secondary

#B9A65C

accent

#C248E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283D91

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

Preview Lab → · Contrast checker → · Palette generator →