#423AB2#423AB2

#423AB2 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.6% C 0.183 H 278.6°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#423AB2
RGB	rgb(66, 58, 178)
HSL	hsl(244, 51%, 46%)
HSV	hsv(244, 67%, 70%)
CMYK	cmyk(62.9%, 67.4%, 0%, 30.2%)
CIE-LAB	lab(32.70, 39.49, -62.68)
CIE-LCH	lch(32.70, 74.08, 302.21°)
OKLab	oklab(43.64% 0.0274 -0.1807)
OKLCH	oklch(43.64% 0.183 278.6)
XYZ	xyz(11.7931, 7.3978, 42.9173)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.69

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423AB2 #AAB23A

analogous

#3A6EB2 #423AB2 #7E3AB2

triadic

#423AB2 #B2423A #3AB242

tetradic

#423AB2 #B23A6E #AAB23A #3AB27E

square

#423AB2 #B23A6E #AAB23A #3AB27E

split-complementary

#423AB2 #B27E3A #6EB23A

monochromatic

#201C56 #312B84 #423AB2 #665FCB #928DDA

Accessibility & contrast

On white

8.47

#423AB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#423AB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AB2

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AB2	#FFFFFF	#000000	##FFFFFF
##423AB2	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B6

Deuteranopia (green-blind)

#0048B0

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423ab2;
/* rgb */ color: rgb(66, 58, 178);
/* oklch */ color: oklch(43.6% 0.183 278.6);

Tailwind

colors: {
  custom: {
    50: '#8371ca',
    500: '#423ab2',
    950: '#000000',
  },
}

SCSS

$custom: #423ab2;
$custom-light: #8371ca;
$custom-dark: #000000;

JSON

{
  "hex": "#423ab2",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 178
  },
  "hsl": {
    "h": 244,
    "s": 50.847,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43642,
    "c": 0.18276,
    "h": 278.6
  },
  "luminance": 0.07399
}

Semantic roles & 50–950 ramp

primary

#423AB2

secondary

#C0C483

accent

#DA4DD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423AB2

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

Preview Lab → · Contrast checker → · Palette generator →