#283D77#283D77

#283D77 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.102 H 266.5°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#283D77
RGB	rgb(40, 61, 119)
HSL	hsl(224, 50%, 31%)
HSV	hsv(224, 66%, 47%)
CMYK	cmyk(66.4%, 48.7%, 0%, 53.3%)
CIE-LAB	lab(27.07, 12.00, -35.76)
CIE-LCH	lch(27.07, 37.72, 288.55°)
OKLab	oklab(37.56% -0.0062 -0.1022)
OKLCH	oklch(37.56% 0.102 266.5)
XYZ	xyz(5.8724, 5.1200, 18.1280)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D77 #776228

analogous

#286477 #283D77 #3A2877

triadic

#283D77 #77283D #3D7728

tetradic

#283D77 #772864 #776228 #28773A

square

#283D77 #772864 #776228 #28773A

split-complementary

#283D77 #773A28 #647728

monochromatic

#090E1B #192649 #283D77 #3754A5 #5472C5

Accessibility & contrast

On white

10.37

#283D77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283D77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D77

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D77	#FFFFFF	#000000	##FFFFFF
##283D77	1.00	10.37	2.02	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204479

Deuteranopia (green-blind)

#123D76

Tritanopia (blue-blind)

#004A54

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283d77;
/* rgb */ color: rgb(40, 61, 119);
/* oklch */ color: oklch(37.6% 0.102 266.5);

Tailwind

colors: {
  custom: {
    50: '#6b729f',
    500: '#283d77',
    950: '#000000',
  },
}

SCSS

$custom: #283d77;
$custom-light: #6b729f;
$custom-dark: #000000;

JSON

{
  "hex": "#283d77",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 119
  },
  "hsl": {
    "h": 224.051,
    "s": 49.686,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37557,
    "c": 0.10244,
    "h": 266.5
  },
  "luminance": 0.05121
}

Semantic roles & 50–950 ramp

primary

#283D77

secondary

#A99252

accent

#B44FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D77

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

Preview Lab → · Contrast checker → · Palette generator →