#423CB9#423CB9

#423CB9 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.6% C 0.189 H 277.6°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#423CB9
RGB	rgb(66, 60, 185)
HSL	hsl(243, 51%, 48%)
HSV	hsv(243, 68%, 73%)
CMYK	cmyk(64.3%, 67.6%, 0%, 27.5%)
CIE-LAB	lab(33.76, 40.59, -65.09)
CIE-LCH	lch(33.76, 76.71, 301.95°)
OKLab	oklab(44.6% 0.0249 -0.1878)
OKLCH	oklch(44.6% 0.189 277.6)
XYZ	xyz(12.6167, 7.8917, 46.7479)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.34

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423CB9 #B3B93C

analogous

#3C74B9 #423CB9 #803CB9

triadic

#423CB9 #B9423C #3CB942

tetradic

#423CB9 #B93C74 #B3B93C #3CB980

square

#423CB9 #B93C74 #B3B93C #3CB980

split-complementary

#423CB9 #B9803C #74B93C

monochromatic

#211E5D #322D8B #423CB9 #6A65CD #9793DC

Accessibility & contrast

On white

8.14

#423CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#423CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CB9

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CB9	#FFFFFF	#000000	##FFFFFF
##423CB9	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#004AB7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423cb9;
/* rgb */ color: rgb(66, 60, 185);
/* oklch */ color: oklch(44.6% 0.189 277.6);

Tailwind

colors: {
  custom: {
    50: '#8573cf',
    500: '#423cb9',
    950: '#000000',
  },
}

SCSS

$custom: #423cb9;
$custom-light: #8573cf;
$custom-dark: #000000;

JSON

{
  "hex": "#423cb9",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 185
  },
  "hsl": {
    "h": 242.88,
    "s": 51.02,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44598,
    "c": 0.18941,
    "h": 277.6
  },
  "luminance": 0.07893
}

Semantic roles & 50–950 ramp

primary

#423CB9

secondary

#C4C789

accent

#DA4DD4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423CB9

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

Preview Lab → · Contrast checker → · Palette generator →