#283F90#283F90

#283F90 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.9% C 0.137 H 267.7°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#283F90
RGB	rgb(40, 63, 144)
HSL	hsl(227, 57%, 36%)
HSV	hsv(227, 72%, 56%)
CMYK	cmyk(72.2%, 56.3%, 0%, 43.5%)
CIE-LAB	lab(29.46, 20.26, -47.48)
CIE-LCH	lch(29.46, 51.62, 293.10°)
OKLab	oklab(39.94% -0.0054 -0.1367)
OKLCH	oklch(39.94% 0.137 267.7)
XYZ	xyz(7.6849, 6.0190, 27.1369)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F90 #907928

analogous

#287390 #283F90 #452890

triadic

#283F90 #90283F #3F9028

tetradic

#283F90 #902873 #907928 #289045

square

#283F90 #902873 #907928 #289045

split-complementary

#283F90 #904528 #739028

monochromatic

#0D1530 #1B2A60 #283F90 #3554C0 #6079D3

Accessibility & contrast

On white

9.53

#283F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#283F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F90

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F90	#FFFFFF	#000000	##FFFFFF
##283F90	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)

#004A93

Deuteranopia (green-blind)

#00418E

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283f90;
/* rgb */ color: rgb(40, 63, 144);
/* oklch */ color: oklch(39.9% 0.137 267.7);

Tailwind

colors: {
  custom: {
    50: '#7073b1',
    500: '#283f90',
    950: '#000000',
  },
}

SCSS

$custom: #283f90;
$custom-light: #7073b1;
$custom-dark: #000000;

JSON

{
  "hex": "#283f90",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 144
  },
  "hsl": {
    "h": 226.731,
    "s": 56.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39944,
    "c": 0.13682,
    "h": 267.7
  },
  "luminance": 0.0602
}

Semantic roles & 50–950 ramp

primary

#283F90

secondary

#B8A45C

accent

#BE48E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #283F90

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

Preview Lab → · Contrast checker → · Palette generator →