#283A87#283A87

#283A87 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.130 H 269.3°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#283A87
RGB	rgb(40, 58, 135)
HSL	hsl(229, 54%, 34%)
HSV	hsv(229, 70%, 53%)
CMYK	cmyk(70.4%, 57%, 0%, 47.1%)
CIE-LAB	lab(27.37, 20.22, -45.31)
CIE-LCH	lch(27.37, 49.62, 294.05°)
OKLab	oklab(38.15% -0.0015 -0.1304)
OKLCH	oklch(38.15% 0.13 269.3)
XYZ	xyz(6.7598, 5.2258, 23.5694)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A87 #877528

analogous

#286A87 #283A87 #462887

triadic

#283A87 #87283A #3A8728

tetradic

#283A87 #87286A #877528 #288746

square

#283A87 #87286A #877528 #288746

split-complementary

#283A87 #874628 #6A8728

monochromatic

#0C1129 #1A2658 #283A87 #364EB6 #5B71CE

Accessibility & contrast

On white

10.27

#283A87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283A87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A87

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A87	#FFFFFF	#000000	##FFFFFF
##283A87	1.00	10.27	2.05	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458A

Deuteranopia (green-blind)

#003C85

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283a87;
/* rgb */ color: rgb(40, 58, 135);
/* oklch */ color: oklch(38.2% 0.130 269.3);

Tailwind

colors: {
  custom: {
    50: '#6e6fab',
    500: '#283a87',
    950: '#000000',
  },
}

SCSS

$custom: #283a87;
$custom-light: #6e6fab;
$custom-dark: #000000;

JSON

{
  "hex": "#283a87",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 135
  },
  "hsl": {
    "h": 228.632,
    "s": 54.286,
    "l": 34.314
  },
  "oklch": {
    "l": 0.38151,
    "c": 0.13041,
    "h": 269.3
  },
  "luminance": 0.05226
}

Semantic roles & 50–950 ramp

primary

#283A87

secondary

#B4A257

accent

#C24ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A87

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

Preview Lab → · Contrast checker → · Palette generator →