#283F84#283F84

#283F84 is a dark, moderate blue. Relative luminance 0.057; OKLCH L 39.0% C 0.119 H 266.9°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#283F84
RGB	rgb(40, 63, 132)
HSL	hsl(225, 53%, 34%)
HSV	hsv(225, 70%, 52%)
CMYK	cmyk(69.7%, 52.3%, 0%, 48.2%)
CIE-LAB	lab(28.57, 15.63, -41.51)
CIE-LCH	lch(28.57, 44.35, 290.63°)
OKLab	oklab(38.99% -0.0064 -0.1191)
OKLCH	oklch(38.99% 0.119 266.9)
XYZ	xyz(6.8160, 5.6714, 22.5608)
Luminance	0.0567 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F84 #846D28

analogous

#286D84 #283F84 #3F2884

triadic

#283F84 #84283F #3F8428

tetradic

#283F84 #84286D #846D28 #28843F

square

#283F84 #84286D #846D28 #28843F

split-complementary

#283F84 #843F28 #6D8428

monochromatic

#0C1226 #1A2955 #283F84 #3655B3 #5A76CD

Accessibility & contrast

On white

9.84

#283F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#283F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F84

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F84	#FFFFFF	#000000	##FFFFFF
##283F84	1.00	9.84	2.13	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164886

Deuteranopia (green-blind)

#003F83

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283f84;
/* rgb */ color: rgb(40, 63, 132);
/* oklch */ color: oklch(39.0% 0.119 266.9);

Tailwind

colors: {
  custom: {
    50: '#6d73a8',
    500: '#283f84',
    950: '#000000',
  },
}

SCSS

$custom: #283f84;
$custom-light: #6d73a8;
$custom-dark: #000000;

JSON

{
  "hex": "#283f84",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 132
  },
  "hsl": {
    "h": 225,
    "s": 53.488,
    "l": 33.725
  },
  "oklch": {
    "l": 0.38985,
    "c": 0.1193,
    "h": 266.9
  },
  "luminance": 0.05672
}

Semantic roles & 50–950 ramp

primary

#283F84

secondary

#B29B56

accent

#B84BDD

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F84

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

Preview Lab → · Contrast checker → · Palette generator →