#283D75#283D75

#283D75 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.099 H 266.2°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#283D75
RGB	rgb(40, 61, 117)
HSL	hsl(224, 49%, 31%)
HSV	hsv(224, 66%, 46%)
CMYK	cmyk(65.8%, 47.9%, 0%, 54.1%)
CIE-LAB	lab(26.94, 11.24, -34.71)
CIE-LCH	lch(26.94, 36.48, 287.94°)
OKLab	oklab(37.41% -0.0065 -0.0992)
OKLCH	oklch(37.41% 0.099 266.2)
XYZ	xyz(5.7536, 5.0724, 17.5020)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D75 #756028

analogous

#286375 #283D75 #392875

triadic

#283D75 #75283D #3D7528

tetradic

#283D75 #752863 #756028 #287539

square

#283D75 #752863 #756028 #287539

split-complementary

#283D75 #753928 #637528

monochromatic

#090D1A #182547 #283D75 #3855A3 #5372C4

Accessibility & contrast

On white

10.42

#283D75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283D75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D75

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D75	#FFFFFF	#000000	##FFFFFF
##283D75	1.00	10.42	2.01	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224377

Deuteranopia (green-blind)

#153C74

Tritanopia (blue-blind)

#004A53

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283d75;
/* rgb */ color: rgb(40, 61, 117);
/* oklch */ color: oklch(37.4% 0.099 266.2);

Tailwind

colors: {
  custom: {
    50: '#6a729d',
    500: '#283d75',
    950: '#000000',
  },
}

SCSS

$custom: #283d75;
$custom-light: #6a729d;
$custom-dark: #000000;

JSON

{
  "hex": "#283d75",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 117
  },
  "hsl": {
    "h": 223.636,
    "s": 49.045,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37412,
    "c": 0.09937,
    "h": 266.2
  },
  "luminance": 0.05073
}

Semantic roles & 50–950 ramp

primary

#283D75

secondary

#A79052

accent

#B34FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D75

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

Preview Lab → · Contrast checker → · Palette generator →