#423EB9#423EB9

#423EB9 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.9% C 0.187 H 277.2°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#423EB9
RGB	rgb(66, 62, 185)
HSL	hsl(242, 50%, 48%)
HSV	hsv(242, 66%, 73%)
CMYK	cmyk(64.3%, 66.5%, 0%, 27.5%)
CIE-LAB	lab(34.20, 39.39, -64.36)
CIE-LCH	lch(34.20, 75.46, 301.47°)
OKLab	oklab(44.92% 0.0234 -0.1856)
OKLCH	oklch(44.92% 0.187 277.2)
XYZ	xyz(12.7235, 8.1052, 46.7835)
Luminance	0.0811 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423EB9 #B5B93E

analogous

#3E77B9 #423EB9 #7F3EB9

triadic

#423EB9 #B9423E #3EB942

tetradic

#423EB9 #B93E77 #B5B93E #3EB97F

square

#423EB9 #B93E77 #B5B93E #3EB97F

split-complementary

#423EB9 #B97F3E #77B93E

monochromatic

#211F5D #322F8B #423EB9 #6B68CC #9896DC

Accessibility & contrast

On white

8.01

#423EB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#423EB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423EB9

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423EB9	#FFFFFF	#000000	##FFFFFF
##423EB9	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#004BB7

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423eb9;
/* rgb */ color: rgb(66, 62, 185);
/* oklch */ color: oklch(44.9% 0.187 277.2);

Tailwind

colors: {
  custom: {
    50: '#8474cf',
    500: '#423eb9',
    950: '#000000',
  },
}

SCSS

$custom: #423eb9;
$custom-light: #8474cf;
$custom-dark: #000000;

JSON

{
  "hex": "#423eb9",
  "rgb": {
    "r": 66,
    "g": 62,
    "b": 185
  },
  "hsl": {
    "h": 241.951,
    "s": 49.798,
    "l": 48.431
  },
  "oklch": {
    "l": 0.4492,
    "c": 0.1871,
    "h": 277.2
  },
  "luminance": 0.08106
}

Semantic roles & 50–950 ramp

primary

#423EB9

secondary

#C5C78C

accent

#D94ED5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423EB9

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

Preview Lab → · Contrast checker → · Palette generator →