#283F8D#283F8D

#283F8D is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.7% C 0.132 H 267.6°. Best body text is #FFFFFF at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#283F8D
RGB	rgb(40, 63, 141)
HSL	hsl(226, 56%, 35%)
HSV	hsv(226, 72%, 55%)
CMYK	cmyk(71.6%, 55.3%, 0%, 44.7%)
CIE-LAB	lab(29.23, 19.10, -46.01)
CIE-LCH	lch(29.23, 49.82, 292.55°)
OKLab	oklab(39.7% -0.0056 -0.1324)
OKLCH	oklch(39.7% 0.132 267.6)
XYZ	xyz(7.4586, 5.9285, 25.9454)
Luminance	0.0593 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F8D #8D7628

analogous

#28718D #283F8D #44288D

triadic

#283F8D #8D283F #3F8D28

tetradic

#283F8D #8D2871 #8D7628 #288D44

square

#283F8D #8D2871 #8D7628 #288D44

split-complementary

#283F8D #8D4428 #718D28

monochromatic

#0D142E #1A2A5D #283F8D #3654BD #5E78D1

Accessibility & contrast

On white

9.61

#283F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#283F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F8D

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F8D	#FFFFFF	#000000	##FFFFFF
##283F8D	1.00	9.61	2.19	9.61
#FFFFFF	9.61	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034A90

Deuteranopia (green-blind)

#00408B

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283f8d;
/* rgb */ color: rgb(40, 63, 141);
/* oklch */ color: oklch(39.7% 0.132 267.6);

Tailwind

colors: {
  custom: {
    50: '#7073af',
    500: '#283f8d',
    950: '#000000',
  },
}

SCSS

$custom: #283f8d;
$custom-light: #7073af;
$custom-dark: #000000;

JSON

{
  "hex": "#283f8d",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 141
  },
  "hsl": {
    "h": 226.337,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.39699,
    "c": 0.13249,
    "h": 267.6
  },
  "luminance": 0.05929
}

Semantic roles & 50–950 ramp

primary

#283F8D

secondary

#B7A25A

accent

#BD49DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F8D

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

Preview Lab → · Contrast checker → · Palette generator →