#283CA8#283CA8

#283CA8 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.174 H 269.0°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#283CA8
RGB	rgb(40, 60, 168)
HSL	hsl(231, 62%, 41%)
HSV	hsv(231, 76%, 66%)
CMYK	cmyk(76.2%, 64.3%, 0%, 34.1%)
CIE-LAB	lab(30.66, 31.37, -60.10)
CIE-LCH	lch(30.66, 67.80, 297.56°)
OKLab	oklab(41.46% -0.0029 -0.1738)
OKLCH	oklch(41.46% 0.174 269)
XYZ	xyz(9.5564, 6.5089, 37.7909)
Luminance	0.0651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CA8 #A89428

analogous

#287CA8 #283CA8 #5428A8

triadic

#283CA8 #A8283C #3CA828

tetradic

#283CA8 #A8287C #A89428 #28A854

square

#283CA8 #A8287C #A89428 #28A854

split-complementary

#283CA8 #A85428 #7CA828

monochromatic

#101945 #1C2A77 #283CA8 #3D54D1 #6E7FDC

Accessibility & contrast

On white

9.12

#283CA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#283CA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CA8

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CA8	#FFFFFF	#000000	##FFFFFF
##283CA8	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283ca8;
/* rgb */ color: rgb(40, 60, 168);
/* oklch */ color: oklch(41.5% 0.174 269.0);

Tailwind

colors: {
  custom: {
    50: '#7671c3',
    500: '#283ca8',
    950: '#000000',
  },
}

SCSS

$custom: #283ca8;
$custom-light: #7671c3;
$custom-dark: #000000;

JSON

{
  "hex": "#283ca8",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 168
  },
  "hsl": {
    "h": 230.625,
    "s": 61.538,
    "l": 40.784
  },
  "oklch": {
    "l": 0.41459,
    "c": 0.17381,
    "h": 269
  },
  "luminance": 0.0651
}

Semantic roles & 50–950 ramp

primary

#283CA8

secondary

#C3B569

accent

#CB43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283CA8

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

Preview Lab → · Contrast checker → · Palette generator →