#283B9D#283B9D

#283B9D is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.160 H 269.3°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#283B9D
RGB	rgb(40, 59, 157)
HSL	hsl(230, 59%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.5%, 62.4%, 0%, 38.4%)
CIE-LAB	lab(29.44, 27.92, -55.45)
CIE-LCH	lch(29.44, 62.08, 296.72°)
OKLab	oklab(40.26% -0.0019 -0.1602)
OKLCH	oklch(40.26% 0.16 269.3)
XYZ	xyz(8.5227, 6.0125, 32.6031)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B9D #9D8A28

analogous

#28759D #283B9D #4F289D

triadic

#283B9D #9D283B #3B9D28

tetradic

#283B9D #9D2875 #9D8A28 #289D4F

square

#283B9D #9D2875 #9D8A28 #289D4F

split-complementary

#283B9D #9D4F28 #759D28

monochromatic

#0F163B #1C296C #283B9D #364FCC #6779D8

Accessibility & contrast

On white

9.53

#283B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#283B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B9D

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B9D	#FFFFFF	#000000	##FFFFFF
##283B9D	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#00409B

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283b9d;
/* rgb */ color: rgb(40, 59, 157);
/* oklch */ color: oklch(40.3% 0.160 269.3);

Tailwind

colors: {
  custom: {
    50: '#7470bb',
    500: '#283b9d',
    950: '#000000',
  },
}

SCSS

$custom: #283b9d;
$custom-light: #7470bb;
$custom-dark: #000000;

JSON

{
  "hex": "#283b9d",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 157
  },
  "hsl": {
    "h": 230.256,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40263,
    "c": 0.16018,
    "h": 269.3
  },
  "luminance": 0.06013
}

Semantic roles & 50–950 ramp

primary

#283B9D

secondary

#BEAF62

accent

#C945E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283B9D

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

Preview Lab → · Contrast checker → · Palette generator →