#283387#283387

#283387 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.7% C 0.140 H 271.9°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).

Color values

HEX	#283387
RGB	rgb(40, 51, 135)
HSL	hsl(233, 54%, 34%)
HSV	hsv(233, 70%, 53%)
CMYK	cmyk(70.4%, 62.2%, 0%, 47.1%)
CIE-LAB	lab(25.46, 25.01, -48.41)
CIE-LCH	lch(25.46, 54.49, 297.32°)
OKLab	oklab(36.73% 0.0046 -0.1396)
OKLCH	oklch(36.73% 0.14 271.9)
XYZ	xyz(6.4306, 4.5674, 23.4597)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283387 #877C28

analogous

#286387 #283387 #4D2887

triadic

#283387 #872833 #338728

tetradic

#283387 #872863 #877C28 #28874D

square

#283387 #872863 #877C28 #28874D

split-complementary

#283387 #874D28 #638728

monochromatic

#0C0F29 #1A2158 #283387 #3645B6 #5B68CE

Accessibility & contrast

On white

10.97

#283387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#283387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283387

10.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283387	#FFFFFF	#000000	##FFFFFF
##283387	1.00	10.97	1.91	10.97
#FFFFFF	10.97	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418A

Deuteranopia (green-blind)

#003885

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283387;
/* rgb */ color: rgb(40, 51, 135);
/* oklch */ color: oklch(36.7% 0.140 271.9);

Tailwind

colors: {
  custom: {
    50: '#6f6aab',
    500: '#283387',
    950: '#000000',
  },
}

SCSS

$custom: #283387;
$custom-light: #6f6aab;
$custom-dark: #000000;

JSON

{
  "hex": "#283387",
  "rgb": {
    "r": 40,
    "g": 51,
    "b": 135
  },
  "hsl": {
    "h": 233.053,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.36732,
    "c": 0.13967,
    "h": 271.9
  },
  "luminance": 0.04568
}

Semantic roles & 50–950 ramp

primary

#283387

secondary

#B4A957

accent

#CD4ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #283387

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

Preview Lab → · Contrast checker → · Palette generator →