#283B9F#283B9F

#283B9F is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.163 H 269.3°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#283B9F
RGB	rgb(40, 59, 159)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.8%, 62.9%, 0%, 37.6%)
CIE-LAB	lab(29.62, 28.67, -56.38)
CIE-LCH	lch(29.62, 63.25, 296.95°)
OKLab	oklab(40.44% -0.002 -0.1629)
OKLCH	oklch(40.44% 0.163 269.3)
XYZ	xyz(8.6949, 6.0813, 33.5097)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B9F #9F8C28

analogous

#28779F #283B9F #51289F

triadic

#283B9F #9F283B #3B9F28

tetradic

#283B9F #9F2877 #9F8C28 #289F51

square

#283B9F #9F2877 #9F8C28 #289F51

split-complementary

#283B9F #9F5128 #779F28

monochromatic

#0F173D #1C296E #283B9F #374FCD #687AD9

Accessibility & contrast

On white

9.47

#283B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#283B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B9F

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B9F	#FFFFFF	#000000	##FFFFFF
##283B9F	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283b9f;
/* rgb */ color: rgb(40, 59, 159);
/* oklch */ color: oklch(40.4% 0.163 269.3);

Tailwind

colors: {
  custom: {
    50: '#7470bc',
    500: '#283b9f',
    950: '#000000',
  },
}

SCSS

$custom: #283b9f;
$custom-light: #7470bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283b9f",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 159
  },
  "hsl": {
    "h": 230.42,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.40444,
    "c": 0.16291,
    "h": 269.3
  },
  "luminance": 0.06082
}

Semantic roles & 50–950 ramp

primary

#283B9F

secondary

#BFB164

accent

#CA45E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283B9F

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

Preview Lab → · Contrast checker → · Palette generator →