#283E99#283E99

#283E99 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.151 H 268.4°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#283E99
RGB	rgb(40, 62, 153)
HSL	hsl(228, 59%, 38%)
HSV	hsv(228, 74%, 60%)
CMYK	cmyk(73.9%, 59.5%, 0%, 40%)
CIE-LAB	lab(29.90, 24.39, -52.27)
CIE-LCH	lch(29.90, 57.68, 295.01°)
OKLab	oklab(40.5% -0.0042 -0.1508)
OKLCH	oklch(40.5% 0.151 268.4)
XYZ	xyz(8.3455, 6.1954, 30.8868)
Luminance	0.0620 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283E99 #998328

analogous

#287699 #283E99 #4B2899

triadic

#283E99 #99283E #3E9928

tetradic

#283E99 #992876 #998328 #28994B

square

#283E99 #992876 #998328 #28994B

split-complementary

#283E99 #994B28 #769928

monochromatic

#0F1738 #1B2A68 #283E99 #3552CA #657BD7

Accessibility & contrast

On white

9.38

#283E99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#283E99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283E99

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283E99	#FFFFFF	#000000	##FFFFFF
##283E99	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004197

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283e99;
/* rgb */ color: rgb(40, 62, 153);
/* oklch */ color: oklch(40.5% 0.151 268.4);

Tailwind

colors: {
  custom: {
    50: '#7273b8',
    500: '#283e99',
    950: '#000000',
  },
}

SCSS

$custom: #283e99;
$custom-light: #7273b8;
$custom-dark: #000000;

JSON

{
  "hex": "#283e99",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 153
  },
  "hsl": {
    "h": 228.319,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.40498,
    "c": 0.15087,
    "h": 268.4
  },
  "luminance": 0.06196
}

Semantic roles & 50–950 ramp

primary

#283E99

secondary

#BDAB60

accent

#C346E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #283E99

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

Preview Lab → · Contrast checker → · Palette generator →