#283C71#283C71

#283C71 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.095 H 266.3°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#283C71
RGB	rgb(40, 60, 113)
HSL	hsl(224, 48%, 30%)
HSV	hsv(224, 65%, 44%)
CMYK	cmyk(64.6%, 46.9%, 0%, 55.7%)
CIE-LAB	lab(26.37, 10.40, -33.08)
CIE-LCH	lch(26.37, 34.67, 287.45°)
OKLab	oklab(36.89% -0.0061 -0.0944)
OKLCH	oklch(36.89% 0.095 266.3)
XYZ	xyz(5.4705, 4.8746, 16.2722)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C71 #715D28

analogous

#286071 #283C71 #392871

triadic

#283C71 #71283C #3C7128

tetradic

#283C71 #712860 #715D28 #287139

square

#283C71 #712860 #715D28 #287139

split-complementary

#283C71 #713928 #607128

monochromatic

#080C17 #182444 #283C71 #38549E #5270C2

Accessibility & contrast

On white

10.63

#283C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#283C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C71

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C71	#FFFFFF	#000000	##FFFFFF
##283C71	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234273

Deuteranopia (green-blind)

#183B70

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283c71;
/* rgb */ color: rgb(40, 60, 113);
/* oklch */ color: oklch(36.9% 0.095 266.3);

Tailwind

colors: {
  custom: {
    50: '#6a719a',
    500: '#283c71',
    950: '#000000',
  },
}

SCSS

$custom: #283c71;
$custom-light: #6a719a;
$custom-dark: #000000;

JSON

{
  "hex": "#283c71",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 113
  },
  "hsl": {
    "h": 223.562,
    "s": 47.712,
    "l": 30
  },
  "oklch": {
    "l": 0.36893,
    "c": 0.09457,
    "h": 266.3
  },
  "luminance": 0.04875
}

Semantic roles & 50–950 ramp

primary

#283C71

secondary

#A38D52

accent

#B250D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283C71

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

Preview Lab → · Contrast checker → · Palette generator →