#283789#283789

#283789 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.137 H 270.5°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#283789
RGB	rgb(40, 55, 137)
HSL	hsl(231, 55%, 35%)
HSV	hsv(231, 71%, 54%)
CMYK	cmyk(70.8%, 59.9%, 0%, 46.3%)
CIE-LAB	lab(26.70, 23.04, -47.64)
CIE-LCH	lch(26.70, 52.92, 295.81°)
OKLab	oklab(37.7% 0.0012 -0.1373)
OKLCH	oklch(37.7% 0.137 270.5)
XYZ	xyz(6.7551, 4.9890, 24.2690)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283789 #897A28

analogous

#286789 #283789 #4A2889

triadic

#283789 #892837 #378928

tetradic

#283789 #892867 #897A28 #28894A

square

#283789 #892867 #897A28 #28894A

split-complementary

#283789 #894A28 #678928

monochromatic

#0C112A #1A245A #283789 #364AB8 #5C6ECF

Accessibility & contrast

On white

10.51

#283789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#283789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283789

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283789	#FFFFFF	#000000	##FFFFFF
##283789	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448C

Deuteranopia (green-blind)

#003B87

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283789;
/* rgb */ color: rgb(40, 55, 137);
/* oklch */ color: oklch(37.7% 0.137 270.5);

Tailwind

colors: {
  custom: {
    50: '#6f6dac',
    500: '#283789',
    950: '#000000',
  },
}

SCSS

$custom: #283789;
$custom-light: #6f6dac;
$custom-dark: #000000;

JSON

{
  "hex": "#283789",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 137
  },
  "hsl": {
    "h": 230.722,
    "s": 54.802,
    "l": 34.706
  },
  "oklch": {
    "l": 0.37704,
    "c": 0.13728,
    "h": 270.5
  },
  "luminance": 0.0499
}

Semantic roles & 50–950 ramp

primary

#283789

secondary

#B5A658

accent

#C74ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283789

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

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