#423FB4#423FB4

#423FB4 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.179 H 277.4°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#423FB4
RGB	rgb(66, 63, 180)
HSL	hsl(242, 48%, 48%)
HSV	hsv(242, 65%, 71%)
CMYK	cmyk(63.3%, 65%, 0%, 29.4%)
CIE-LAB	lab(34.00, 37.12, -61.74)
CIE-LCH	lch(34.00, 72.04, 301.02°)
OKLab	oklab(44.64% 0.0231 -0.1779)
OKLCH	oklch(44.64% 0.179 277.4)
XYZ	xyz(12.2598, 8.0076, 44.0707)
Luminance	0.0801 (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

#423FB4 #B1B43F

analogous

#3F77B4 #423FB4 #7C3FB4

triadic

#423FB4 #B4423F #3FB442

tetradic

#423FB4 #B43F77 #B1B43F #3FB47C

square

#423FB4 #B43F77 #B1B43F #3FB47C

split-complementary

#423FB4 #B47C3F #77B43F

monochromatic

#211F59 #312F87 #423FB4 #6967CA #9694DA

Accessibility & contrast

On white

8.07

#423FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#423FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB4

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB4	#FFFFFF	#000000	##FFFFFF
##423FB4	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#004BB2

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423fb4;
/* rgb */ color: rgb(66, 63, 180);
/* oklch */ color: oklch(44.6% 0.179 277.4);

Tailwind

colors: {
  custom: {
    50: '#8374cb',
    500: '#423fb4',
    950: '#000000',
  },
}

SCSS

$custom: #423fb4;
$custom-light: #8374cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb4",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 241.538,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.4464,
    "c": 0.17941,
    "h": 277.4
  },
  "luminance": 0.08009
}

Semantic roles & 50–950 ramp

primary

#423FB4

secondary

#C3C58A

accent

#D850D4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB4

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

Preview Lab → · Contrast checker → · Palette generator →