#283D63#283D63

#283D63 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.2% C 0.071 H 261.5°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#283D63
RGB	rgb(40, 61, 99)
HSL	hsl(219, 42%, 27%)
HSV	hsv(219, 60%, 39%)
CMYK	cmyk(59.6%, 38.4%, 0%, 61.2%)
CIE-LAB	lab(25.83, 4.45, -24.96)
CIE-LCH	lch(25.83, 25.36, 280.11°)
OKLab	oklab(36.2% -0.0105 -0.0706)
OKLCH	oklch(36.2% 0.071 261.5)
XYZ	xyz(4.7952, 4.6891, 12.4544)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D63 #634E28

analogous

#285B63 #283D63 #312863

triadic

#283D63 #63283D #3D6328

tetradic

#283D63 #63285B #634E28 #286331

square

#283D63 #63285B #634E28 #286331

split-complementary

#283D63 #633128 #5B6328

monochromatic

#090D16 #162237 #283D63 #3A588F #4E73B7

Accessibility & contrast

On white

10.84

#283D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D63

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D63	#FFFFFF	#000000	##FFFFFF
##283D63	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4065

Deuteranopia (green-blind)

#263B62

Tritanopia (blue-blind)

#02454B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283d63;
/* rgb */ color: rgb(40, 61, 99);
/* oklch */ color: oklch(36.2% 0.071 261.5);

Tailwind

colors: {
  custom: {
    50: '#67728f',
    500: '#283d63',
    950: '#000000',
  },
}

SCSS

$custom: #283d63;
$custom-light: #67728f;
$custom-dark: #000000;

JSON

{
  "hex": "#283d63",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 99
  },
  "hsl": {
    "h": 218.644,
    "s": 42.446,
    "l": 27.255
  },
  "oklch": {
    "l": 0.36195,
    "c": 0.07138,
    "h": 261.5
  },
  "luminance": 0.04689
}

Semantic roles & 50–950 ramp

primary

#283D63

secondary

#967D51

accent

#A656D2

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283D63

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

Preview Lab → · Contrast checker → · Palette generator →