#283F83#283F83

#283F83 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.9% C 0.118 H 266.8°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#283F83
RGB	rgb(40, 63, 131)
HSL	hsl(225, 53%, 34%)
HSV	hsv(225, 69%, 51%)
CMYK	cmyk(69.5%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(28.50, 15.24, -41.00)
CIE-LCH	lch(28.50, 43.74, 290.39°)
OKLab	oklab(38.91% -0.0066 -0.1176)
OKLCH	oklch(38.91% 0.118 266.8)
XYZ	xyz(6.7479, 5.6442, 22.2021)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F83 #836C28

analogous

#286C83 #283F83 #3E2883

triadic

#283F83 #83283F #3F8328

tetradic

#283F83 #83286C #836C28 #28833E

square

#283F83 #83286C #836C28 #28833E

split-complementary

#283F83 #833E28 #6C8328

monochromatic

#0B1225 #1A2854 #283F83 #3656B2 #5976CC

Accessibility & contrast

On white

9.86

#283F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#283F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F83

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F83	#FFFFFF	#000000	##FFFFFF
##283F83	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184885

Deuteranopia (green-blind)

#003F82

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283f83;
/* rgb */ color: rgb(40, 63, 131);
/* oklch */ color: oklch(38.9% 0.118 266.8);

Tailwind

colors: {
  custom: {
    50: '#6d73a7',
    500: '#283f83',
    950: '#000000',
  },
}

SCSS

$custom: #283f83;
$custom-light: #6d73a7;
$custom-dark: #000000;

JSON

{
  "hex": "#283f83",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 224.835,
    "s": 53.216,
    "l": 33.529
  },
  "oklch": {
    "l": 0.38908,
    "c": 0.11781,
    "h": 266.8
  },
  "luminance": 0.05645
}

Semantic roles & 50–950 ramp

primary

#283F83

secondary

#B19A55

accent

#B84BDD

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #283F83

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

Preview Lab → · Contrast checker → · Palette generator →