#423FB7#423FB7

#423FB7 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.9% C 0.183 H 277.2°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#423FB7
RGB	rgb(66, 63, 183)
HSL	hsl(242, 49%, 48%)
HSV	hsv(242, 66%, 72%)
CMYK	cmyk(63.9%, 65.6%, 0%, 28.2%)
CIE-LAB	lab(34.25, 38.12, -63.10)
CIE-LCH	lch(34.25, 73.72, 301.14°)
OKLab	oklab(44.91% 0.0228 -0.1819)
OKLCH	oklch(44.91% 0.183 277.2)
XYZ	xyz(12.5687, 8.1311, 45.6977)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 1.98

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB7 #B4B73F

analogous

#3F78B7 #423FB7 #7E3FB7

triadic

#423FB7 #B7423F #3FB742

tetradic

#423FB7 #B73F78 #B4B73F #3FB77E

square

#423FB7 #B73F78 #B4B73F #3FB77E

split-complementary

#423FB7 #B77E3F #78B73F

monochromatic

#21205C #322F89 #423FB7 #6B68CB #9796DB

Accessibility & contrast

On white

8.00

#423FB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#423FB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB7

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB7	#FFFFFF	#000000	##FFFFFF
##423FB7	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BB

Deuteranopia (green-blind)

#004BB5

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #423fb7;
/* rgb */ color: rgb(66, 63, 183);
/* oklch */ color: oklch(44.9% 0.183 277.2);

Tailwind

colors: {
  custom: {
    50: '#8475ce',
    500: '#423fb7',
    950: '#000000',
  },
}

SCSS

$custom: #423fb7;
$custom-light: #8475ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb7",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 183
  },
  "hsl": {
    "h": 241.5,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44905,
    "c": 0.18333,
    "h": 277.2
  },
  "luminance": 0.08132
}

Semantic roles & 50–950 ramp

primary

#423FB7

secondary

#C5C68B

accent

#D84FD5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423FB7

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

Preview Lab → · Contrast checker → · Palette generator →