#283D74#283D74

#283D74 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.098 H 266.1°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#283D74
RGB	rgb(40, 61, 116)
HSL	hsl(223, 49%, 31%)
HSV	hsv(223, 66%, 45%)
CMYK	cmyk(65.5%, 47.4%, 0%, 54.5%)
CIE-LAB	lab(26.87, 10.85, -34.18)
CIE-LCH	lch(26.87, 35.86, 287.61°)
OKLab	oklab(37.34% -0.0067 -0.0976)
OKLCH	oklch(37.34% 0.098 266.1)
XYZ	xyz(5.6951, 5.0491, 17.1940)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D74 #745F28

analogous

#286374 #283D74 #392874

triadic

#283D74 #74283D #3D7428

tetradic

#283D74 #742863 #745F28 #287439

square

#283D74 #742863 #745F28 #287439

split-complementary

#283D74 #743928 #637428

monochromatic

#090D19 #182546 #283D74 #3855A2 #5372C4

Accessibility & contrast

On white

10.45

#283D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D74

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D74	#FFFFFF	#000000	##FFFFFF
##283D74	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234376

Deuteranopia (green-blind)

#163C73

Tritanopia (blue-blind)

#004A53

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283d74;
/* rgb */ color: rgb(40, 61, 116);
/* oklch */ color: oklch(37.3% 0.098 266.1);

Tailwind

colors: {
  custom: {
    50: '#6a729c',
    500: '#283d74',
    950: '#000000',
  },
}

SCSS

$custom: #283d74;
$custom-light: #6a729c;
$custom-dark: #000000;

JSON

{
  "hex": "#283d74",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 116
  },
  "hsl": {
    "h": 223.421,
    "s": 48.718,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3734,
    "c": 0.09784,
    "h": 266.1
  },
  "luminance": 0.0505
}

Semantic roles & 50–950 ramp

primary

#283D74

secondary

#A68F52

accent

#B250D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D74

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

Preview Lab → · Contrast checker → · Palette generator →