#423FB8#423FB8

#423FB8 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 45.0% C 0.185 H 277.1°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#423FB8
RGB	rgb(66, 63, 184)
HSL	hsl(241, 49%, 48%)
HSV	hsv(241, 66%, 72%)
CMYK	cmyk(64.1%, 65.8%, 0%, 27.8%)
CIE-LAB	lab(34.34, 38.45, -63.55)
CIE-LCH	lch(34.34, 74.28, 301.18°)
OKLab	oklab(44.99% 0.0227 -0.1832)
OKLCH	oklch(44.99% 0.185 277.1)
XYZ	xyz(12.6732, 8.1729, 46.2478)
Luminance	0.0817 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 1.99

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB8 #B5B83F

analogous

#3F78B8 #423FB8 #7E3FB8

triadic

#423FB8 #B8423F #3FB842

tetradic

#423FB8 #B83F78 #B5B83F #3FB87E

square

#423FB8 #B83F78 #B5B83F #3FB87E

split-complementary

#423FB8 #B87E3F #78B83F

monochromatic

#21205D #322F8A #423FB8 #6B69CC #9896DB

Accessibility & contrast

On white

7.97

#423FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#423FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB8

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB8	#FFFFFF	#000000	##FFFFFF
##423FB8	1.00	7.97	2.63	7.97
#FFFFFF	7.97	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004CB6

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #423fb8;
/* rgb */ color: rgb(66, 63, 184);
/* oklch */ color: oklch(45.0% 0.185 277.1);

Tailwind

colors: {
  custom: {
    50: '#8475ce',
    500: '#423fb8',
    950: '#000000',
  },
}

SCSS

$custom: #423fb8;
$custom-light: #8475ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb8",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 184
  },
  "hsl": {
    "h": 241.488,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44994,
    "c": 0.18462,
    "h": 277.1
  },
  "luminance": 0.08174
}

Semantic roles & 50–950 ramp

primary

#423FB8

secondary

#C5C78C

accent

#D94FD5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423FB8

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

Preview Lab → · Contrast checker → · Palette generator →