#423AA4#423AA4

#423AA4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.164 H 280.1°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#423AA4
RGB	rgb(66, 58, 164)
HSL	hsl(245, 48%, 44%)
HSV	hsv(245, 65%, 64%)
CMYK	cmyk(59.8%, 64.6%, 0%, 35.7%)
CIE-LAB	lab(31.50, 34.88, -56.27)
CIE-LCH	lch(31.50, 66.20, 301.79°)
OKLab	oklab(42.4% 0.0289 -0.1619)
OKLCH	oklch(42.4% 0.164 280.1)
XYZ	xyz(10.4585, 6.8640, 35.8885)
Luminance	0.0687 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423AA4 #9CA43A

analogous

#3A67A4 #423AA4 #773AA4

triadic

#423AA4 #A4423A #3AA442

tetradic

#423AA4 #A43A67 #9CA43A #3AA477

square

#423AA4 #A43A67 #9CA43A #3AA477

split-complementary

#423AA4 #A4773A #67A43A

monochromatic

#1E1A4A #302A77 #423AA4 #6057C4 #8B85D4

Accessibility & contrast

On white

8.85

#423AA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#423AA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AA4

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AA4	#FFFFFF	#000000	##FFFFFF
##423AA4	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0046A2

Tritanopia (blue-blind)

#005569

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #423aa4;
/* rgb */ color: rgb(66, 58, 164);
/* oklch */ color: oklch(42.4% 0.164 280.1);

Tailwind

colors: {
  custom: {
    50: '#8171c0',
    500: '#423aa4',
    950: '#000000',
  },
}

SCSS

$custom: #423aa4;
$custom-light: #8171c0;
$custom-dark: #000000;

JSON

{
  "hex": "#423aa4",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 164
  },
  "hsl": {
    "h": 244.528,
    "s": 47.748,
    "l": 43.529
  },
  "oklch": {
    "l": 0.42399,
    "c": 0.16444,
    "h": 280.1
  },
  "luminance": 0.06865
}

Semantic roles & 50–950 ramp

primary

#423AA4

secondary

#B9BE7C

accent

#D750CD

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #423AA4

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

Preview Lab → · Contrast checker → · Palette generator →