#283B90#283B90

#283B90 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.142 H 269.2°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#283B90
RGB	rgb(40, 59, 144)
HSL	hsl(229, 57%, 36%)
HSV	hsv(229, 72%, 56%)
CMYK	cmyk(72.2%, 59%, 0%, 43.5%)
CIE-LAB	lab(28.36, 22.99, -49.27)
CIE-LCH	lch(28.36, 54.37, 295.01°)
OKLab	oklab(39.12% -0.002 -0.142)
OKLCH	oklch(39.12% 0.142 269.2)
XYZ	xyz(7.4714, 5.5919, 27.0657)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B90 #907D28

analogous

#286F90 #283B90 #492890

triadic

#283B90 #90283B #3B9028

tetradic

#283B90 #90286F #907D28 #289049

square

#283B90 #90286F #907D28 #289049

split-complementary

#283B90 #904928 #6F9028

monochromatic

#0D1430 #1B2760 #283B90 #354FC0 #6075D3

Accessibility & contrast

On white

9.91

#283B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#283B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B90

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B90	#FFFFFF	#000000	##FFFFFF
##283B90	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003E8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283b90;
/* rgb */ color: rgb(40, 59, 144);
/* oklch */ color: oklch(39.1% 0.142 269.2);

Tailwind

colors: {
  custom: {
    50: '#7070b1',
    500: '#283b90',
    950: '#000000',
  },
}

SCSS

$custom: #283b90;
$custom-light: #7070b1;
$custom-dark: #000000;

JSON

{
  "hex": "#283b90",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 144
  },
  "hsl": {
    "h": 229.038,
    "s": 56.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39118,
    "c": 0.14204,
    "h": 269.2
  },
  "luminance": 0.05593
}

Semantic roles & 50–950 ramp

primary

#283B90

secondary

#B8A75C

accent

#C448E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283B90

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

Preview Lab → · Contrast checker → · Palette generator →