#283C99#283C99

#283C99 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.153 H 269.0°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#283C99
RGB	rgb(40, 60, 153)
HSL	hsl(229, 59%, 38%)
HSV	hsv(229, 74%, 60%)
CMYK	cmyk(73.9%, 60.8%, 0%, 40%)
CIE-LAB	lab(29.37, 25.73, -53.14)
CIE-LCH	lch(29.37, 59.05, 295.84°)
OKLab	oklab(40.1% -0.0027 -0.1534)
OKLCH	oklch(40.1% 0.153 269)
XYZ	xyz(8.2387, 5.9819, 30.8512)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C99 #998528

analogous

#287499 #283C99 #4D2899

triadic

#283C99 #99283C #3C9928

tetradic

#283C99 #992874 #998528 #28994D

square

#283C99 #992874 #998528 #28994D

split-complementary

#283C99 #994D28 #749928

monochromatic

#0F1638 #1B2968 #283C99 #354FCA #6579D7

Accessibility & contrast

On white

9.56

#283C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#283C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C99

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C99	#FFFFFF	#000000	##FFFFFF
##283C99	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283c99;
/* rgb */ color: rgb(40, 60, 153);
/* oklch */ color: oklch(40.1% 0.153 269.0);

Tailwind

colors: {
  custom: {
    50: '#7371b8',
    500: '#283c99',
    950: '#000000',
  },
}

SCSS

$custom: #283c99;
$custom-light: #7371b8;
$custom-dark: #000000;

JSON

{
  "hex": "#283c99",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 229.381,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.401,
    "c": 0.1534,
    "h": 269
  },
  "luminance": 0.05983
}

Semantic roles & 50–950 ramp

primary

#283C99

secondary

#BDAC60

accent

#C646E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283C99

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

Preview Lab → · Contrast checker → · Palette generator →