#283F97#283F97

#283F97 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.147 H 268.0°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#283F97
RGB	rgb(40, 63, 151)
HSL	hsl(228, 58%, 37%)
HSV	hsv(228, 74%, 59%)
CMYK	cmyk(73.5%, 58.3%, 0%, 40.8%)
CIE-LAB	lab(30.01, 22.95, -50.88)
CIE-LCH	lch(30.01, 55.81, 294.28°)
OKLab	oklab(40.53% -0.005 -0.1467)
OKLCH	oklch(40.53% 0.147 268)
XYZ	xyz(8.2366, 6.2396, 30.0424)
Luminance	0.0624 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F97 #978028

analogous

#287697 #283F97 #492897

triadic

#283F97 #97283F #3F9728

tetradic

#283F97 #972876 #978028 #289749

square

#283F97 #972876 #978028 #289749

split-complementary

#283F97 #974928 #769728

monochromatic

#0E1736 #1B2B67 #283F97 #3553C7 #647BD6

Accessibility & contrast

On white

9.34

#283F97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#283F97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F97

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F97	#FFFFFF	#000000	##FFFFFF
##283F97	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9A

Deuteranopia (green-blind)

#004295

Tritanopia (blue-blind)

#005564

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283f97;
/* rgb */ color: rgb(40, 63, 151);
/* oklch */ color: oklch(40.5% 0.147 268.0);

Tailwind

colors: {
  custom: {
    50: '#7273b6',
    500: '#283f97',
    950: '#000000',
  },
}

SCSS

$custom: #283f97;
$custom-light: #7273b6;
$custom-dark: #000000;

JSON

{
  "hex": "#283f97",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 151
  },
  "hsl": {
    "h": 227.568,
    "s": 58.115,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40528,
    "c": 0.14678,
    "h": 268
  },
  "luminance": 0.0624
}

Semantic roles & 50–950 ramp

primary

#283F97

secondary

#BCA85F

accent

#C146E1

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #283F97

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

Preview Lab → · Contrast checker → · Palette generator →