#423DA8#423DA8

#423DA8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.166 H 279.0°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#423DA8
RGB	rgb(66, 61, 168)
HSL	hsl(243, 47%, 45%)
HSV	hsv(243, 64%, 66%)
CMYK	cmyk(60.7%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(32.53, 34.34, -56.98)
CIE-LCH	lch(32.53, 66.53, 301.08°)
OKLab	oklab(43.26% 0.0259 -0.164)
OKLCH	oklch(43.26% 0.166 279)
XYZ	xyz(10.9811, 7.3221, 37.8728)
Luminance	0.0732 (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

#423DA8 #A3A83D

analogous

#3D6DA8 #423DA8 #783DA8

triadic

#423DA8 #A8423D #3DA842

tetradic

#423DA8 #A83D6D #A3A83D #3DA878

square

#423DA8 #A83D6D #A3A83D #3DA878

split-complementary

#423DA8 #A8783D #6DA83D

monochromatic

#1F1C4E #302D7B #423DA8 #635EC4 #8E8BD5

Accessibility & contrast

On white

8.52

#423DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#423DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DA8

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DA8	#FFFFFF	#000000	##FFFFFF
##423DA8	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0048A6

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #423da8;
/* rgb */ color: rgb(66, 61, 168);
/* oklch */ color: oklch(43.3% 0.166 279.0);

Tailwind

colors: {
  custom: {
    50: '#8173c3',
    500: '#423da8',
    950: '#000000',
  },
}

SCSS

$custom: #423da8;
$custom-light: #8173c3;
$custom-dark: #000000;

JSON

{
  "hex": "#423da8",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 242.804,
    "s": 46.725,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43257,
    "c": 0.166,
    "h": 279
  },
  "luminance": 0.07323
}

Semantic roles & 50–950 ramp

primary

#423DA8

secondary

#BCBF81

accent

#D651D0

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #423DA8

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

Preview Lab → · Contrast checker → · Palette generator →