#283FA1#283FA1

#283FA1 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.4% C 0.161 H 268.3°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#283FA1
RGB	rgb(40, 63, 161)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 63%)
CMYK	cmyk(75.2%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(30.83, 26.76, -55.61)
CIE-LCH	lch(30.83, 61.72, 295.69°)
OKLab	oklab(41.39% -0.0048 -0.1606)
OKLCH	oklch(41.39% 0.161 268.3)
XYZ	xyz(9.0834, 6.5784, 34.5023)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283FA1 #A18A28

analogous

#287CA1 #283FA1 #4E28A1

triadic

#283FA1 #A1283F #3FA128

tetradic

#283FA1 #A1287C #A18A28 #28A14E

square

#283FA1 #A1287C #A18A28 #28A14E

split-complementary

#283FA1 #A14E28 #7CA128

monochromatic

#10193F #1C2C70 #283FA1 #3955CE #6A7FDA

Accessibility & contrast

On white

9.07

#283FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283FA1

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283FA1	#FFFFFF	#000000	##FFFFFF
##283FA1	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00439F

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283fa1;
/* rgb */ color: rgb(40, 63, 161);
/* oklch */ color: oklch(41.4% 0.161 268.3);

Tailwind

colors: {
  custom: {
    50: '#7473be',
    500: '#283fa1',
    950: '#000000',
  },
}

SCSS

$custom: #283fa1;
$custom-light: #7473be;
$custom-dark: #000000;

JSON

{
  "hex": "#283fa1",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 228.595,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41394,
    "c": 0.16067,
    "h": 268.3
  },
  "luminance": 0.06579
}

Semantic roles & 50–950 ramp

primary

#283FA1

secondary

#C0AF65

accent

#C544E3

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283FA1

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

Preview Lab → · Contrast checker → · Palette generator →