#283A84#283A84

#283A84 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.126 H 269.2°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#283A84
RGB	rgb(40, 58, 132)
HSL	hsl(228, 53%, 34%)
HSV	hsv(228, 70%, 52%)
CMYK	cmyk(69.7%, 56.1%, 0%, 48.2%)
CIE-LAB	lab(27.14, 19.07, -43.82)
CIE-LCH	lch(27.14, 47.79, 293.52°)
OKLab	oklab(37.9% -0.0017 -0.126)
OKLCH	oklch(37.9% 0.126 269.2)
XYZ	xyz(6.5516, 5.1425, 22.4727)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A84 #847228

analogous

#286884 #283A84 #442884

triadic

#283A84 #84283A #3A8428

tetradic

#283A84 #842868 #847228 #288444

square

#283A84 #842868 #847228 #288444

split-complementary

#283A84 #844428 #688428

monochromatic

#0C1126 #1A2555 #283A84 #364FB3 #5A70CD

Accessibility & contrast

On white

10.35

#283A84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#283A84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A84

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A84	#FFFFFF	#000000	##FFFFFF
##283A84	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#024487

Deuteranopia (green-blind)

#003C83

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283a84;
/* rgb */ color: rgb(40, 58, 132);
/* oklch */ color: oklch(37.9% 0.126 269.2);

Tailwind

colors: {
  custom: {
    50: '#6e6fa8',
    500: '#283a84',
    950: '#000000',
  },
}

SCSS

$custom: #283a84;
$custom-light: #6e6fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#283a84",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 132
  },
  "hsl": {
    "h": 228.261,
    "s": 53.488,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37904,
    "c": 0.12602,
    "h": 269.2
  },
  "luminance": 0.05143
}

Semantic roles & 50–950 ramp

primary

#283A84

secondary

#B2A056

accent

#C04BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A84

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

Preview Lab → · Contrast checker → · Palette generator →