#283C74#283C74

#283C74 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.1% C 0.099 H 266.8°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#283C74
RGB	rgb(40, 60, 116)
HSL	hsl(224, 49%, 31%)
HSV	hsv(224, 66%, 45%)
CMYK	cmyk(65.5%, 48.3%, 0%, 54.5%)
CIE-LAB	lab(26.57, 11.54, -34.66)
CIE-LCH	lch(26.57, 36.54, 288.42°)
OKLab	oklab(37.11% -0.0056 -0.099)
OKLCH	oklch(37.11% 0.099 266.8)
XYZ	xyz(5.6422, 4.9433, 17.1764)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C74 #746028

analogous

#286274 #283C74 #3A2874

triadic

#283C74 #74283C #3C7428

tetradic

#283C74 #742862 #746028 #28743A

square

#283C74 #742862 #746028 #28743A

split-complementary

#283C74 #743A28 #627428

monochromatic

#090D19 #182446 #283C74 #3854A2 #5370C4

Accessibility & contrast

On white

10.56

#283C74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283C74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C74

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C74	#FFFFFF	#000000	##FFFFFF
##283C74	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214276

Deuteranopia (green-blind)

#143C73

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283c74;
/* rgb */ color: rgb(40, 60, 116);
/* oklch */ color: oklch(37.1% 0.099 266.8);

Tailwind

colors: {
  custom: {
    50: '#6a719c',
    500: '#283c74',
    950: '#000000',
  },
}

SCSS

$custom: #283c74;
$custom-light: #6a719c;
$custom-dark: #000000;

JSON

{
  "hex": "#283c74",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 116
  },
  "hsl": {
    "h": 224.211,
    "s": 48.718,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37109,
    "c": 0.0992,
    "h": 266.8
  },
  "luminance": 0.04944
}

Semantic roles & 50–950 ramp

primary

#283C74

secondary

#A69052

accent

#B450D8

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283C74

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

Preview Lab → · Contrast checker → · Palette generator →