#283F82#283F82

#283F82 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.8% C 0.116 H 266.7°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#283F82
RGB	rgb(40, 63, 130)
HSL	hsl(225, 53%, 33%)
HSV	hsv(225, 69%, 51%)
CMYK	cmyk(69.2%, 51.5%, 0%, 49%)
CIE-LAB	lab(28.43, 14.86, -40.49)
CIE-LCH	lch(28.43, 43.13, 290.15°)
OKLab	oklab(38.83% -0.0067 -0.1161)
OKLCH	oklch(38.83% 0.116 266.7)
XYZ	xyz(6.6804, 5.6172, 21.8469)
Luminance	0.0562 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F82 #826B28

analogous

#286C82 #283F82 #3E2882

triadic

#283F82 #82283F #3F8228

tetradic

#283F82 #82286C #826B28 #28823E

square

#283F82 #82286C #826B28 #28823E

split-complementary

#283F82 #823E28 #6C8228

monochromatic

#0B1224 #1A2853 #283F82 #3656B1 #5976CC

Accessibility & contrast

On white

9.89

#283F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#283F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F82

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F82	#FFFFFF	#000000	##FFFFFF
##283F82	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194784

Deuteranopia (green-blind)

#003F81

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283f82;
/* rgb */ color: rgb(40, 63, 130);
/* oklch */ color: oklch(38.8% 0.116 266.7);

Tailwind

colors: {
  custom: {
    50: '#6d73a7',
    500: '#283f82',
    950: '#000000',
  },
}

SCSS

$custom: #283f82;
$custom-light: #6d73a7;
$custom-dark: #000000;

JSON

{
  "hex": "#283f82",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 130
  },
  "hsl": {
    "h": 224.667,
    "s": 52.941,
    "l": 33.333
  },
  "oklch": {
    "l": 0.38832,
    "c": 0.11633,
    "h": 266.7
  },
  "luminance": 0.05618
}

Semantic roles & 50–950 ramp

primary

#283F82

secondary

#B19955

accent

#B74BDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #283F82

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

Preview Lab → · Contrast checker → · Palette generator →