#283B9E#283B9E

#283B9E is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.162 H 269.3°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#283B9E
RGB	rgb(40, 59, 158)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.7%, 62.7%, 0%, 38%)
CIE-LAB	lab(29.53, 28.29, -55.92)
CIE-LCH	lch(29.53, 62.67, 296.84°)
OKLab	oklab(40.35% -0.002 -0.1615)
OKLCH	oklch(40.35% 0.162 269.3)
XYZ	xyz(8.6085, 6.0468, 33.0546)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B9E #9E8B28

analogous

#28769E #283B9E #50289E

triadic

#283B9E #9E283B #3B9E28

tetradic

#283B9E #9E2876 #9E8B28 #289E50

square

#283B9E #9E2876 #9E8B28 #289E50

split-complementary

#283B9E #9E5028 #769E28

monochromatic

#0F173C #1C296D #283B9E #374FCC #687AD9

Accessibility & contrast

On white

9.50

#283B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#283B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B9E

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B9E	#FFFFFF	#000000	##FFFFFF
##283B9E	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283b9e;
/* rgb */ color: rgb(40, 59, 158);
/* oklch */ color: oklch(40.4% 0.162 269.3);

Tailwind

colors: {
  custom: {
    50: '#7470bc',
    500: '#283b9e',
    950: '#000000',
  },
}

SCSS

$custom: #283b9e;
$custom-light: #7470bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283b9e",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 158
  },
  "hsl": {
    "h": 230.339,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40353,
    "c": 0.16155,
    "h": 269.3
  },
  "luminance": 0.06048
}

Semantic roles & 50–950 ramp

primary

#283B9E

secondary

#BFB063

accent

#C945E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283B9E

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

Preview Lab → · Contrast checker → · Palette generator →