#283A78#283A78

#283A78 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 37.0% C 0.108 H 268.5°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#283A78
RGB	rgb(40, 58, 120)
HSL	hsl(227, 50%, 31%)
HSV	hsv(227, 67%, 47%)
CMYK	cmyk(66.7%, 51.7%, 0%, 52.9%)
CIE-LAB	lab(26.25, 14.46, -37.71)
CIE-LCH	lch(26.25, 40.39, 290.99°)
OKLab	oklab(36.95% -0.0028 -0.108)
OKLCH	oklch(36.95% 0.108 268.5)
XYZ	xyz(5.7771, 4.8328, 18.3940)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A78 #786628

analogous

#286278 #283A78 #3E2878

triadic

#283A78 #78283A #3A7828

tetradic

#283A78 #782862 #786628 #28783E

square

#283A78 #782862 #786628 #28783E

split-complementary

#283A78 #783E28 #627828

monochromatic

#090E1C #19244A #283A78 #3750A6 #546EC6

Accessibility & contrast

On white

10.68

#283A78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283A78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A78

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A78	#FFFFFF	#000000	##FFFFFF
##283A78	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18427A

Deuteranopia (green-blind)

#053B77

Tritanopia (blue-blind)

#004853

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283a78;
/* rgb */ color: rgb(40, 58, 120);
/* oklch */ color: oklch(37.0% 0.108 268.5);

Tailwind

colors: {
  custom: {
    50: '#6b6f9f',
    500: '#283a78',
    950: '#000000',
  },
}

SCSS

$custom: #283a78;
$custom-light: #6b6f9f;
$custom-dark: #000000;

JSON

{
  "hex": "#283a78",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 120
  },
  "hsl": {
    "h": 226.5,
    "s": 50,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36954,
    "c": 0.10807,
    "h": 268.5
  },
  "luminance": 0.04833
}

Semantic roles & 50–950 ramp

primary

#283A78

secondary

#AA9652

accent

#BA4EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283A78

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

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