#283B87#283B87

#283B87 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.129 H 268.9°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#283B87
RGB	rgb(40, 59, 135)
HSL	hsl(228, 54%, 34%)
HSV	hsv(228, 70%, 53%)
CMYK	cmyk(70.4%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(27.65, 19.54, -44.86)
CIE-LCH	lch(27.65, 48.93, 293.53°)
OKLab	oklab(38.36% -0.0024 -0.129)
OKLCH	oklch(38.36% 0.129 268.9)
XYZ	xyz(6.8107, 5.3277, 23.5864)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B87 #877428

analogous

#286B87 #283B87 #452887

triadic

#283B87 #87283B #3B8728

tetradic

#283B87 #87286B #877428 #288745

square

#283B87 #87286B #877428 #288745

split-complementary

#283B87 #874528 #6B8728

monochromatic

#0C1229 #1A2658 #283B87 #3650B6 #5B72CE

Accessibility & contrast

On white

10.17

#283B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B87

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B87	#FFFFFF	#000000	##FFFFFF
##283B87	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468A

Deuteranopia (green-blind)

#003D85

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283b87;
/* rgb */ color: rgb(40, 59, 135);
/* oklch */ color: oklch(38.4% 0.129 268.9);

Tailwind

colors: {
  custom: {
    50: '#6e70ab',
    500: '#283b87',
    950: '#000000',
  },
}

SCSS

$custom: #283b87;
$custom-light: #6e70ab;
$custom-dark: #000000;

JSON

{
  "hex": "#283b87",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 228,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.38362,
    "c": 0.12907,
    "h": 268.9
  },
  "luminance": 0.05328
}

Semantic roles & 50–950 ramp

primary

#283B87

secondary

#B4A157

accent

#C04ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283B87

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

Preview Lab → · Contrast checker → · Palette generator →