#283D64#283D64

#283D64 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.073 H 261.9°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#283D64
RGB	rgb(40, 61, 100)
HSL	hsl(219, 43%, 27%)
HSV	hsv(219, 60%, 39%)
CMYK	cmyk(60%, 39%, 0%, 60.8%)
CIE-LAB	lab(25.89, 4.82, -25.52)
CIE-LCH	lch(25.89, 25.97, 280.70°)
OKLab	oklab(36.26% -0.0102 -0.0722)
OKLCH	oklch(36.26% 0.073 261.9)
XYZ	xyz(4.8433, 4.7083, 12.7077)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D64 #644F28

analogous

#285B64 #283D64 #312864

triadic

#283D64 #64283D #3D6428

tetradic

#283D64 #64285B #644F28 #286431

square

#283D64 #64285B #644F28 #286431

split-complementary

#283D64 #643128 #5B6428

monochromatic

#090D16 #172238 #283D64 #395890 #4E73B8

Accessibility & contrast

On white

10.81

#283D64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283D64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D64

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D64	#FFFFFF	#000000	##FFFFFF
##283D64	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4066

Deuteranopia (green-blind)

#253B63

Tritanopia (blue-blind)

#01464B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283d64;
/* rgb */ color: rgb(40, 61, 100);
/* oklch */ color: oklch(36.3% 0.073 261.9);

Tailwind

colors: {
  custom: {
    50: '#677290',
    500: '#283d64',
    950: '#000000',
  },
}

SCSS

$custom: #283d64;
$custom-light: #677290;
$custom-dark: #000000;

JSON

{
  "hex": "#283d64",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 100
  },
  "hsl": {
    "h": 219,
    "s": 42.857,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36258,
    "c": 0.07294,
    "h": 261.9
  },
  "luminance": 0.04709
}

Semantic roles & 50–950 ramp

primary

#283D64

secondary

#977E51

accent

#A755D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283D64

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

Preview Lab → · Contrast checker → · Palette generator →