#423BB7#423BB7

#423BB7 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.188 H 277.9°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#423BB7
RGB	rgb(66, 59, 183)
HSL	hsl(243, 51%, 47%)
HSV	hsv(243, 68%, 72%)
CMYK	cmyk(63.9%, 67.8%, 0%, 28.2%)
CIE-LAB	lab(33.36, 40.53, -64.56)
CIE-LCH	lch(33.36, 76.23, 302.12°)
OKLab	oklab(44.26% 0.026 -0.1862)
OKLCH	oklch(44.26% 0.188 277.9)
XYZ	xyz(12.3552, 7.7041, 45.6265)
Luminance	0.0770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.47

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BB7 #B0B73B

analogous

#3B72B7 #423BB7 #803BB7

triadic

#423BB7 #B7423B #3BB742

tetradic

#423BB7 #B73B72 #B0B73B #3BB780

square

#423BB7 #B73B72 #B0B73B #3BB780

split-complementary

#423BB7 #B7803B #72B73B

monochromatic

#211D5A #312C89 #423BB7 #6963CD #9591DC

Accessibility & contrast

On white

8.26

#423BB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#423BB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB7

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB7	#FFFFFF	#000000	##FFFFFF
##423BB7	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BB

Deuteranopia (green-blind)

#0049B5

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423bb7;
/* rgb */ color: rgb(66, 59, 183);
/* oklch */ color: oklch(44.3% 0.188 277.9);

Tailwind

colors: {
  custom: {
    50: '#8472ce',
    500: '#423bb7',
    950: '#000000',
  },
}

SCSS

$custom: #423bb7;
$custom-light: #8472ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb7",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 183
  },
  "hsl": {
    "h": 243.387,
    "s": 51.24,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44257,
    "c": 0.18801,
    "h": 277.9
  },
  "luminance": 0.07705
}

Semantic roles & 50–950 ramp

primary

#423BB7

secondary

#C3C687

accent

#DB4DD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423BB7

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

Preview Lab → · Contrast checker → · Palette generator →