#283188#283188

#283188 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.4% C 0.144 H 272.5°. Best body text is #FFFFFF at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#283188
RGB	rgb(40, 49, 136)
HSL	hsl(234, 55%, 35%)
HSV	hsv(234, 71%, 53%)
CMYK	cmyk(70.6%, 64%, 0%, 46.7%)
CIE-LAB	lab(25.03, 26.74, -49.74)
CIE-LCH	lch(25.03, 56.47, 298.26°)
OKLab	oklab(36.44% 0.0062 -0.1435)
OKLCH	oklch(36.44% 0.144 272.5)
XYZ	xyz(6.4158, 4.4247, 23.8037)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283188 #887F28

analogous

#286188 #283188 #4F2888

triadic

#283188 #882831 #318828

tetradic

#283188 #882861 #887F28 #28884F

square

#283188 #882861 #887F28 #28884F

split-complementary

#283188 #884F28 #618828

monochromatic

#0C0F29 #1A2059 #283188 #3642B7 #5B66CF

Accessibility & contrast

On white

11.14

#283188 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#283188 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283188

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283188	#FFFFFF	#000000	##FFFFFF
##283188	1.00	11.14	1.89	11.14
#FFFFFF	11.14	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408B

Deuteranopia (green-blind)

#003786

Tritanopia (blue-blind)

#004757

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283188;
/* rgb */ color: rgb(40, 49, 136);
/* oklch */ color: oklch(36.4% 0.144 272.5);

Tailwind

colors: {
  custom: {
    50: '#6f69ab',
    500: '#283188',
    950: '#000000',
  },
}

SCSS

$custom: #283188;
$custom-light: #6f69ab;
$custom-dark: #000000;

JSON

{
  "hex": "#283188",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 136
  },
  "hsl": {
    "h": 234.375,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.36437,
    "c": 0.14366,
    "h": 272.5
  },
  "luminance": 0.04425
}

Semantic roles & 50–950 ramp

primary

#283188

secondary

#B4AB58

accent

#D04ADE

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #283188

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

Preview Lab → · Contrast checker → · Palette generator →