#283C8E#283C8E

#283C8E is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.2% C 0.138 H 268.8°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#283C8E
RGB	rgb(40, 60, 142)
HSL	hsl(228, 56%, 36%)
HSV	hsv(228, 72%, 56%)
CMYK	cmyk(71.8%, 57.7%, 0%, 44.3%)
CIE-LAB	lab(28.47, 21.54, -47.85)
CIE-LCH	lch(28.47, 52.48, 294.23°)
OKLab	oklab(39.15% -0.0029 -0.1378)
OKLCH	oklch(39.15% 0.138 268.8)
XYZ	xyz(7.3717, 5.6351, 26.2851)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C8E #8E7A28

analogous

#286F8E #283C8E #47288E

triadic

#283C8E #8E283C #3C8E28

tetradic

#283C8E #8E286F #8E7A28 #288E47

square

#283C8E #8E286F #8E7A28 #288E47

split-complementary

#283C8E #8E4728 #6F8E28

monochromatic

#0D142F #1B285E #283C8E #3550BE #5F75D2

Accessibility & contrast

On white

9.87

#283C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#283C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C8E

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C8E	#FFFFFF	#000000	##FFFFFF
##283C8E	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004891

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283c8e;
/* rgb */ color: rgb(40, 60, 142);
/* oklch */ color: oklch(39.2% 0.138 268.8);

Tailwind

colors: {
  custom: {
    50: '#7071b0',
    500: '#283c8e',
    950: '#000000',
  },
}

SCSS

$custom: #283c8e;
$custom-light: #7071b0;
$custom-dark: #000000;

JSON

{
  "hex": "#283c8e",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 142
  },
  "hsl": {
    "h": 228.235,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.39152,
    "c": 0.13788,
    "h": 268.8
  },
  "luminance": 0.05636
}

Semantic roles & 50–950 ramp

primary

#283C8E

secondary

#B7A55B

accent

#C248DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283C8E

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

Preview Lab → · Contrast checker → · Palette generator →