#283F78#283F78

#283F78 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.1% C 0.101 H 265.4°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#283F78
RGB	rgb(40, 63, 120)
HSL	hsl(223, 50%, 31%)
HSV	hsv(223, 67%, 47%)
CMYK	cmyk(66.7%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(27.74, 11.01, -35.32)
CIE-LCH	lch(27.74, 37.00, 287.31°)
OKLab	oklab(38.09% -0.0082 -0.1009)
OKLCH	oklch(38.09% 0.101 265.4)
XYZ	xyz(6.0416, 5.3616, 18.4822)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F78 #786128

analogous

#286778 #283F78 #392878

triadic

#283F78 #78283F #3F7828

tetradic

#283F78 #782867 #786128 #287839

square

#283F78 #782867 #786128 #287839

split-complementary

#283F78 #783928 #677828

monochromatic

#090F1C #19274A #283F78 #3757A6 #5475C6

Accessibility & contrast

On white

10.13

#283F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F78

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F78	#FFFFFF	#000000	##FFFFFF
##283F78	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23457A

Deuteranopia (green-blind)

#153E77

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f78;
/* rgb */ color: rgb(40, 63, 120);
/* oklch */ color: oklch(38.1% 0.101 265.4);

Tailwind

colors: {
  custom: {
    50: '#6b739f',
    500: '#283f78',
    950: '#000000',
  },
}

SCSS

$custom: #283f78;
$custom-light: #6b739f;
$custom-dark: #000000;

JSON

{
  "hex": "#283f78",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 222.75,
    "s": 50,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38089,
    "c": 0.10126,
    "h": 265.4
  },
  "luminance": 0.05362
}

Semantic roles & 50–950 ramp

primary

#283F78

secondary

#AA9152

accent

#B14EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F78

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

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