#283A83#283A83

#283A83 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.125 H 269.2°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#283A83
RGB	rgb(40, 58, 131)
HSL	hsl(228, 53%, 34%)
HSV	hsv(228, 69%, 51%)
CMYK	cmyk(69.5%, 55.7%, 0%, 48.6%)
CIE-LAB	lab(27.06, 18.69, -43.32)
CIE-LCH	lch(27.06, 47.18, 293.34°)
OKLab	oklab(37.82% -0.0017 -0.1245)
OKLCH	oklch(37.82% 0.125 269.2)
XYZ	xyz(6.4835, 5.1153, 22.1140)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A83 #837128

analogous

#286783 #283A83 #432883

triadic

#283A83 #83283A #3A8328

tetradic

#283A83 #832867 #837128 #288343

square

#283A83 #832867 #837128 #288343

split-complementary

#283A83 #834328 #678328

monochromatic

#0B1025 #1A2554 #283A83 #364FB2 #5970CC

Accessibility & contrast

On white

10.38

#283A83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283A83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A83

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A83	#FFFFFF	#000000	##FFFFFF
##283A83	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#044486

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004B58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283a83;
/* rgb */ color: rgb(40, 58, 131);
/* oklch */ color: oklch(37.8% 0.125 269.2);

Tailwind

colors: {
  custom: {
    50: '#6e6fa8',
    500: '#283a83',
    950: '#000000',
  },
}

SCSS

$custom: #283a83;
$custom-light: #6e6fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#283a83",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 131
  },
  "hsl": {
    "h": 228.132,
    "s": 53.216,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37822,
    "c": 0.12454,
    "h": 269.2
  },
  "luminance": 0.05116
}

Semantic roles & 50–950 ramp

primary

#283A83

secondary

#B19F55

accent

#C04BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A83

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

Preview Lab → · Contrast checker → · Palette generator →