#283999#283999

#283999 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.5% C 0.157 H 269.8°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#283999
RGB	rgb(40, 57, 153)
HSL	hsl(231, 59%, 38%)
HSV	hsv(231, 74%, 60%)
CMYK	cmyk(73.9%, 62.7%, 0%, 40%)
CIE-LAB	lab(28.58, 27.75, -54.43)
CIE-LCH	lch(28.58, 61.09, 297.01°)
OKLab	oklab(39.52% -0.0004 -0.1572)
OKLCH	oklch(39.52% 0.157 269.8)
XYZ	xyz(8.0860, 5.6764, 30.8003)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283999 #998828

analogous

#287299 #283999 #4F2899

triadic

#283999 #992839 #399928

tetradic

#283999 #992872 #998828 #28994F

square

#283999 #992872 #998828 #28994F

split-complementary

#283999 #994F28 #729928

monochromatic

#0F1538 #1B2768 #283999 #354BCA #6576D7

Accessibility & contrast

On white

9.83

#283999 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#283999 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283999

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283999	#FFFFFF	#000000	##FFFFFF
##283999	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499C

Deuteranopia (green-blind)

#003E97

Tritanopia (blue-blind)

#005263

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283999;
/* rgb */ color: rgb(40, 57, 153);
/* oklch */ color: oklch(39.5% 0.157 269.8);

Tailwind

colors: {
  custom: {
    50: '#736fb8',
    500: '#283999',
    950: '#000000',
  },
}

SCSS

$custom: #283999;
$custom-light: #736fb8;
$custom-dark: #000000;

JSON

{
  "hex": "#283999",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 153
  },
  "hsl": {
    "h": 230.973,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39518,
    "c": 0.15718,
    "h": 269.8
  },
  "luminance": 0.05677
}

Semantic roles & 50–950 ramp

primary

#283999

secondary

#BDAF60

accent

#CA46E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283999

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

Preview Lab → · Contrast checker → · Palette generator →