#283F72#283F72

#283F72 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.092 H 264.2°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#283F72
RGB	rgb(40, 63, 114)
HSL	hsl(221, 48%, 30%)
HSV	hsv(221, 65%, 45%)
CMYK	cmyk(64.9%, 44.7%, 0%, 55.3%)
CIE-LAB	lab(27.35, 8.71, -32.15)
CIE-LCH	lch(27.35, 33.31, 285.16°)
OKLab	oklab(37.67% -0.0093 -0.0916)
OKLCH	oklch(37.67% 0.092 264.2)
XYZ	xyz(5.6888, 5.2205, 16.6242)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F72 #725B28

analogous

#286472 #283F72 #362872

triadic

#283F72 #72283F #3F7228

tetradic

#283F72 #722864 #725B28 #287236

square

#283F72 #722864 #725B28 #287236

split-complementary

#283F72 #723628 #647228

monochromatic

#080D17 #182645 #283F72 #38589F #5275C2

Accessibility & contrast

On white

10.27

#283F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#283F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F72

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F72	#FFFFFF	#000000	##FFFFFF
##283F72	1.00	10.27	2.04	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284474

Deuteranopia (green-blind)

#1D3D71

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f72;
/* rgb */ color: rgb(40, 63, 114);
/* oklch */ color: oklch(37.7% 0.092 264.2);

Tailwind

colors: {
  custom: {
    50: '#6a739b',
    500: '#283f72',
    950: '#000000',
  },
}

SCSS

$custom: #283f72;
$custom-light: #6a739b;
$custom-dark: #000000;

JSON

{
  "hex": "#283f72",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 114
  },
  "hsl": {
    "h": 221.351,
    "s": 48.052,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37667,
    "c": 0.09207,
    "h": 264.2
  },
  "luminance": 0.05221
}

Semantic roles & 50–950 ramp

primary

#283F72

secondary

#A48B52

accent

#AE50D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F72

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

Preview Lab → · Contrast checker → · Palette generator →