#423BBC#423BBC

#423BBC is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.7% C 0.194 H 277.5°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#423BBC
RGB	rgb(66, 59, 188)
HSL	hsl(243, 52%, 48%)
HSV	hsv(243, 69%, 74%)
CMYK	cmyk(64.9%, 68.6%, 0%, 26.3%)
CIE-LAB	lab(33.81, 42.17, -66.78)
CIE-LCH	lch(33.81, 78.98, 302.27°)
OKLab	oklab(44.72% 0.0253 -0.1927)
OKLCH	oklch(44.72% 0.194 277.5)
XYZ	xyz(12.8849, 7.9160, 48.4161)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.59

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BBC #B5BC3B

analogous

#3B74BC #423BBC #823BBC

triadic

#423BBC #BC423B #3BBC42

tetradic

#423BBC #BC3B74 #B5BC3B #3BBC82

square

#423BBC #BC3B74 #B5BC3B #3BBC82

split-complementary

#423BBC #BC823B #74BC3B

monochromatic

#211E5F #322C8D #423BBC #6B65CF #9894DD

Accessibility & contrast

On white

8.13

#423BBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#423BBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BBC

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BBC	#FFFFFF	#000000	##FFFFFF
##423BBC	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C0

Deuteranopia (green-blind)

#004ABA

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423bbc;
/* rgb */ color: rgb(66, 59, 188);
/* oklch */ color: oklch(44.7% 0.194 277.5);

Tailwind

colors: {
  custom: {
    50: '#8572d1',
    500: '#423bbc',
    950: '#000000',
  },
}

SCSS

$custom: #423bbc;
$custom-light: #8572d1;
$custom-dark: #000000;

JSON

{
  "hex": "#423bbc",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 188
  },
  "hsl": {
    "h": 243.256,
    "s": 52.227,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44717,
    "c": 0.19435,
    "h": 277.5
  },
  "luminance": 0.07917
}

Semantic roles & 50–950 ramp

primary

#423BBC

secondary

#C5C98A

accent

#DC4CD4

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #423BBC

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

Preview Lab → · Contrast checker → · Palette generator →