#423DB8#423DB8

#423DB8 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.7% C 0.187 H 277.5°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#423DB8
RGB	rgb(66, 61, 184)
HSL	hsl(242, 50%, 48%)
HSV	hsv(242, 67%, 72%)
CMYK	cmyk(64.1%, 66.8%, 0%, 27.8%)
CIE-LAB	lab(33.89, 39.66, -64.28)
CIE-LCH	lch(33.89, 75.53, 301.67°)
OKLab	oklab(44.67% 0.0243 -0.1854)
OKLCH	oklch(44.67% 0.187 277.5)
XYZ	xyz(12.5644, 7.9554, 46.2115)
Luminance	0.0796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.18

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DB8 #B3B83D

analogous

#3D75B8 #423DB8 #7F3DB8

triadic

#423DB8 #B8423D #3DB842

tetradic

#423DB8 #B83D75 #B3B83D #3DB87F

square

#423DB8 #B83D75 #B3B83D #3DB87F

split-complementary

#423DB8 #B87F3D #75B83D

monochromatic

#211F5C #322E8A #423DB8 #6A66CC #9794DB

Accessibility & contrast

On white

8.10

#423DB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#423DB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB8

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB8	#FFFFFF	#000000	##FFFFFF
##423DB8	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423db8;
/* rgb */ color: rgb(66, 61, 184);
/* oklch */ color: oklch(44.7% 0.187 277.5);

Tailwind

colors: {
  custom: {
    50: '#8473ce',
    500: '#423db8',
    950: '#000000',
  },
}

SCSS

$custom: #423db8;
$custom-light: #8473ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423db8",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 184
  },
  "hsl": {
    "h": 242.439,
    "s": 50.204,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44668,
    "c": 0.18697,
    "h": 277.5
  },
  "luminance": 0.07956
}

Semantic roles & 50–950 ramp

primary

#423DB8

secondary

#C4C78A

accent

#DA4ED4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423DB8

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

Preview Lab → · Contrast checker → · Palette generator →