#283F8E#283F8E

#283F8E is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.8% C 0.134 H 267.6°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#283F8E
RGB	rgb(40, 63, 142)
HSL	hsl(226, 56%, 36%)
HSV	hsv(226, 72%, 56%)
CMYK	cmyk(71.8%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(29.31, 19.49, -46.50)
CIE-LCH	lch(29.31, 50.42, 292.74°)
OKLab	oklab(39.78% -0.0055 -0.1338)
OKLCH	oklch(39.78% 0.134 267.6)
XYZ	xyz(7.5334, 5.9584, 26.3390)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F8E #8E7728

analogous

#28728E #283F8E #44288E

triadic

#283F8E #8E283F #3F8E28

tetradic

#283F8E #8E2872 #8E7728 #288E44

square

#283F8E #8E2872 #8E7728 #288E44

split-complementary

#283F8E #8E4428 #728E28

monochromatic

#0D152F #1B2A5E #283F8E #3554BE #5F79D2

Accessibility & contrast

On white

9.58

#283F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#283F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F8E

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F8E	#FFFFFF	#000000	##FFFFFF
##283F8E	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A91

Deuteranopia (green-blind)

#00418C

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283f8e;
/* rgb */ color: rgb(40, 63, 142);
/* oklch */ color: oklch(39.8% 0.134 267.6);

Tailwind

colors: {
  custom: {
    50: '#7073b0',
    500: '#283f8e',
    950: '#000000',
  },
}

SCSS

$custom: #283f8e;
$custom-light: #7073b0;
$custom-dark: #000000;

JSON

{
  "hex": "#283f8e",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 226.471,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.3978,
    "c": 0.13393,
    "h": 267.6
  },
  "luminance": 0.05959
}

Semantic roles & 50–950 ramp

primary

#283F8E

secondary

#B7A25B

accent

#BD48DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F8E

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

Preview Lab → · Contrast checker → · Palette generator →