#283B8D#283B8D

#283B8D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.9% C 0.138 H 269.1°. Best body text is #FFFFFF at 10.00:1 contrast (WCAG AA passes).

Color values

HEX	#283B8D
RGB	rgb(40, 59, 141)
HSL	hsl(229, 56%, 35%)
HSV	hsv(229, 72%, 55%)
CMYK	cmyk(71.6%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(28.12, 21.84, -47.81)
CIE-LCH	lch(28.12, 52.56, 294.55°)
OKLab	oklab(38.86% -0.0021 -0.1377)
OKLCH	oklch(38.86% 0.138 269.1)
XYZ	xyz(7.2451, 5.5014, 25.8742)
Luminance	0.0550 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B8D #8D7A28

analogous

#286D8D #283B8D #47288D

triadic

#283B8D #8D283B #3B8D28

tetradic

#283B8D #8D286D #8D7A28 #288D47

square

#283B8D #8D286D #8D7A28 #288D47

split-complementary

#283B8D #8D4728 #6D8D28

monochromatic

#0D132E #1A275D #283B8D #364FBD #5E74D1

Accessibility & contrast

On white

10.00

#283B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#283B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B8D

10.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B8D	#FFFFFF	#000000	##FFFFFF
##283B8D	1.00	10.00	2.10	10.00
#FFFFFF	10.00	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003E8B

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283b8d;
/* rgb */ color: rgb(40, 59, 141);
/* oklch */ color: oklch(38.9% 0.138 269.1);

Tailwind

colors: {
  custom: {
    50: '#7070af',
    500: '#283b8d',
    950: '#000000',
  },
}

SCSS

$custom: #283b8d;
$custom-light: #7070af;
$custom-dark: #000000;

JSON

{
  "hex": "#283b8d",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 228.713,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.38862,
    "c": 0.13776,
    "h": 269.1
  },
  "luminance": 0.05502
}

Semantic roles & 50–950 ramp

primary

#283B8D

secondary

#B7A55A

accent

#C349DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283B8D

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

Preview Lab → · Contrast checker → · Palette generator →