#283D87#283D87

#283D87 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.126 H 268.1°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#283D87
RGB	rgb(40, 61, 135)
HSL	hsl(227, 54%, 34%)
HSV	hsv(227, 70%, 53%)
CMYK	cmyk(70.4%, 54.8%, 0%, 47.1%)
CIE-LAB	lab(28.21, 18.16, -43.94)
CIE-LCH	lch(28.21, 47.55, 292.45°)
OKLab	oklab(38.79% -0.0042 -0.1263)
OKLCH	oklch(38.79% 0.126 268.1)
XYZ	xyz(6.9155, 5.5372, 23.6213)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D87 #877228

analogous

#286D87 #283D87 #432887

triadic

#283D87 #87283D #3D8728

tetradic

#283D87 #87286D #877228 #288743

square

#283D87 #87286D #877228 #288743

split-complementary

#283D87 #874328 #6D8728

monochromatic

#0C1229 #1A2858 #283D87 #3652B6 #5B75CE

Accessibility & contrast

On white

9.96

#283D87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#283D87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D87

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D87	#FFFFFF	#000000	##FFFFFF
##283D87	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09478A

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283d87;
/* rgb */ color: rgb(40, 61, 135);
/* oklch */ color: oklch(38.8% 0.126 268.1);

Tailwind

colors: {
  custom: {
    50: '#6e72aa',
    500: '#283d87',
    950: '#000000',
  },
}

SCSS

$custom: #283d87;
$custom-light: #6e72aa;
$custom-dark: #000000;

JSON

{
  "hex": "#283d87",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 135
  },
  "hsl": {
    "h": 226.737,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.38787,
    "c": 0.1264,
    "h": 268.1
  },
  "luminance": 0.05538
}

Semantic roles & 50–950 ramp

primary

#283D87

secondary

#B49F57

accent

#BD4ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283D87

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

Preview Lab → · Contrast checker → · Palette generator →