#423FA6#423FA6

#423FA6 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.4% C 0.161 H 278.6°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#423FA6
RGB	rgb(66, 63, 166)
HSL	hsl(242, 45%, 45%)
HSV	hsv(242, 62%, 65%)
CMYK	cmyk(60.2%, 62%, 0%, 34.9%)
CIE-LAB	lab(32.84, 32.42, -55.27)
CIE-LCH	lch(32.84, 64.08, 300.40°)
OKLab	oklab(43.44% 0.0241 -0.1589)
OKLCH	oklch(43.44% 0.161 278.6)
XYZ	xyz(10.9050, 7.4656, 36.9354)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.45

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA6 #A3A63F

analogous

#3F6FA6 #423FA6 #763FA6

triadic

#423FA6 #A6423F #3FA642

tetradic

#423FA6 #A63F6F #A3A63F #3FA676

square

#423FA6 #A63F6F #A3A63F #3FA676

split-complementary

#423FA6 #A6763F #6FA63F

monochromatic

#1F1D4D #302E7A #423FA6 #6360C3 #8E8CD3

Accessibility & contrast

On white

8.42

#423FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#423FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA6

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA6	#FFFFFF	#000000	##FFFFFF
##423FA6	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A9

Deuteranopia (green-blind)

#0049A4

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423fa6;
/* rgb */ color: rgb(66, 63, 166);
/* oklch */ color: oklch(43.4% 0.161 278.6);

Tailwind

colors: {
  custom: {
    50: '#8174c1',
    500: '#423fa6',
    950: '#000000',
  },
}

SCSS

$custom: #423fa6;
$custom-light: #8174c1;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa6",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 241.748,
    "s": 44.978,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43437,
    "c": 0.16075,
    "h": 278.6
  },
  "luminance": 0.07466
}

Semantic roles & 50–950 ramp

primary

#423FA6

secondary

#BCBE83

accent

#D553D1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA6

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

Preview Lab → · Contrast checker → · Palette generator →