#283F73#283F73

#283F73 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.094 H 264.4°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#283F73
RGB	rgb(40, 63, 115)
HSL	hsl(222, 48%, 30%)
HSV	hsv(222, 65%, 45%)
CMYK	cmyk(65.2%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(27.42, 9.09, -32.68)
CIE-LCH	lch(27.42, 33.92, 285.55°)
OKLab	oklab(37.74% -0.0091 -0.0932)
OKLCH	oklch(37.74% 0.094 264.4)
XYZ	xyz(5.7460, 5.2434, 16.9256)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F73 #735C28

analogous

#286473 #283F73 #362873

triadic

#283F73 #73283F #3F7328

tetradic

#283F73 #732864 #735C28 #287336

square

#283F73 #732864 #735C28 #287336

split-complementary

#283F73 #733628 #647328

monochromatic

#080D18 #182646 #283F73 #3858A0 #5275C3

Accessibility & contrast

On white

10.25

#283F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F73

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F73	#FFFFFF	#000000	##FFFFFF
##283F73	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274475

Deuteranopia (green-blind)

#1C3E72

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283f73;
/* rgb */ color: rgb(40, 63, 115);
/* oklch */ color: oklch(37.7% 0.094 264.4);

Tailwind

colors: {
  custom: {
    50: '#6a739b',
    500: '#283f73',
    950: '#000000',
  },
}

SCSS

$custom: #283f73;
$custom-light: #6a739b;
$custom-dark: #000000;

JSON

{
  "hex": "#283f73",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 221.6,
    "s": 48.387,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37736,
    "c": 0.09362,
    "h": 264.4
  },
  "luminance": 0.05244
}

Semantic roles & 50–950 ramp

primary

#283F73

secondary

#A58C52

accent

#AE50D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F73

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

Preview Lab → · Contrast checker → · Palette generator →