#423FB5#423FB5

#423FB5 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.7% C 0.181 H 277.3°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#423FB5
RGB	rgb(66, 63, 181)
HSL	hsl(242, 48%, 48%)
HSV	hsv(242, 65%, 71%)
CMYK	cmyk(63.5%, 65.2%, 0%, 29%)
CIE-LAB	lab(34.08, 37.45, -62.19)
CIE-LCH	lch(34.08, 72.60, 301.06°)
OKLab	oklab(44.73% 0.023 -0.1792)
OKLCH	oklch(44.73% 0.181 277.3)
XYZ	xyz(12.3621, 8.0485, 44.6092)
Luminance	0.0805 (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

#423FB5 #B2B53F

analogous

#3F77B5 #423FB5 #7D3FB5

triadic

#423FB5 #B5423F #3FB542

tetradic

#423FB5 #B53F77 #B2B53F #3FB57D

square

#423FB5 #B53F77 #B2B53F #3FB57D

split-complementary

#423FB5 #B57D3F #77B53F

monochromatic

#211F5A #312F88 #423FB5 #6A67CA #9694DA

Accessibility & contrast

On white

8.05

#423FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#423FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB5

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB5	#FFFFFF	#000000	##FFFFFF
##423FB5	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B9

Deuteranopia (green-blind)

#004BB3

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423fb5;
/* rgb */ color: rgb(66, 63, 181);
/* oklch */ color: oklch(44.7% 0.181 277.3);

Tailwind

colors: {
  custom: {
    50: '#8474cc',
    500: '#423fb5',
    950: '#000000',
  },
}

SCSS

$custom: #423fb5;
$custom-light: #8474cc;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb5",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 241.525,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44728,
    "c": 0.18072,
    "h": 277.3
  },
  "luminance": 0.08049
}

Semantic roles & 50–950 ramp

primary

#423FB5

secondary

#C4C58A

accent

#D850D4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB5

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

Preview Lab → · Contrast checker → · Palette generator →