#423AB9#423AB9

#423AB9 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.192 H 277.9°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#423AB9
RGB	rgb(66, 58, 185)
HSL	hsl(244, 52%, 48%)
HSV	hsv(244, 69%, 73%)
CMYK	cmyk(64.3%, 68.6%, 0%, 27.5%)
CIE-LAB	lab(33.32, 41.78, -65.81)
CIE-LCH	lch(33.32, 77.95, 302.41°)
OKLab	oklab(44.28% 0.0264 -0.1899)
OKLCH	oklch(44.28% 0.192 277.9)
XYZ	xyz(12.5140, 7.6861, 46.7136)
Luminance	0.0769 (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

#423AB9 #B1B93A

analogous

#3A71B9 #423AB9 #823AB9

triadic

#423AB9 #B9423A #3AB942

tetradic

#423AB9 #B93A71 #B1B93A #3AB982

square

#423AB9 #B93A71 #B1B93A #3AB982

split-complementary

#423AB9 #B9823A #71B93A

monochromatic

#211D5C #312B8A #423AB9 #6962CE #9691DC

Accessibility & contrast

On white

8.28

#423AB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#423AB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AB9

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AB9	#FFFFFF	#000000	##FFFFFF
##423AB9	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423ab9;
/* rgb */ color: rgb(66, 58, 185);
/* oklch */ color: oklch(44.3% 0.192 277.9);

Tailwind

colors: {
  custom: {
    50: '#8571cf',
    500: '#423ab9',
    950: '#000000',
  },
}

SCSS

$custom: #423ab9;
$custom-light: #8571cf;
$custom-dark: #000000;

JSON

{
  "hex": "#423ab9",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 185
  },
  "hsl": {
    "h": 243.78,
    "s": 52.263,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44284,
    "c": 0.19169,
    "h": 277.9
  },
  "luminance": 0.07687
}

Semantic roles & 50–950 ramp

primary

#423AB9

secondary

#C3C787

accent

#DC4CD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423AB9

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

Preview Lab → · Contrast checker → · Palette generator →