#423AB3#423AB3

#423AB3 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.184 H 278.5°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#423AB3
RGB	rgb(66, 58, 179)
HSL	hsl(244, 51%, 46%)
HSV	hsv(244, 68%, 70%)
CMYK	cmyk(63.1%, 67.6%, 0%, 29.8%)
CIE-LAB	lab(32.78, 39.81, -63.13)
CIE-LCH	lch(32.78, 74.64, 302.24°)
OKLab	oklab(43.73% 0.0273 -0.182)
OKLCH	oklch(43.73% 0.184 278.5)
XYZ	xyz(11.8939, 7.4381, 43.4480)
Luminance	0.0744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.67

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423AB3 #ABB33A

analogous

#3A6FB3 #423AB3 #7F3AB3

triadic

#423AB3 #B3423A #3AB342

tetradic

#423AB3 #B33A6F #ABB33A #3AB37F

square

#423AB3 #B33A6F #ABB33A #3AB37F

split-complementary

#423AB3 #B37F3A #6FB33A

monochromatic

#201C57 #312B85 #423AB3 #665FCB #928DDA

Accessibility & contrast

On white

8.44

#423AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#423AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AB3

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AB3	#FFFFFF	#000000	##FFFFFF
##423AB3	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423ab3;
/* rgb */ color: rgb(66, 58, 179);
/* oklch */ color: oklch(43.7% 0.184 278.5);

Tailwind

colors: {
  custom: {
    50: '#8471cb',
    500: '#423ab3',
    950: '#000000',
  },
}

SCSS

$custom: #423ab3;
$custom-light: #8471cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423ab3",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 179
  },
  "hsl": {
    "h": 243.967,
    "s": 51.055,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43733,
    "c": 0.18405,
    "h": 278.5
  },
  "luminance": 0.07439
}

Semantic roles & 50–950 ramp

primary

#423AB3

secondary

#C0C584

accent

#DB4DD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423AB3

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

Preview Lab → · Contrast checker → · Palette generator →