#423FB9#423FB9

#423FB9 is a mid, vivid blue. Relative luminance 0.082; OKLCH L 45.1% C 0.186 H 277.0°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#423FB9
RGB	rgb(66, 63, 185)
HSL	hsl(241, 49%, 49%)
HSV	hsv(241, 66%, 73%)
CMYK	cmyk(64.3%, 65.9%, 0%, 27.5%)
CIE-LAB	lab(34.43, 38.79, -63.99)
CIE-LCH	lch(34.43, 74.83, 301.22°)
OKLab	oklab(45.08% 0.0226 -0.1845)
OKLCH	oklch(45.08% 0.186 277)
XYZ	xyz(12.7784, 8.2150, 46.8018)
Luminance	0.0822 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.02

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB9 #B6B93F

analogous

#3F79B9 #423FB9 #7F3FB9

triadic

#423FB9 #B9423F #3FB942

tetradic

#423FB9 #B93F79 #B6B93F #3FB97F

square

#423FB9 #B93F79 #B6B93F #3FB97F

split-complementary

#423FB9 #B97F3F #79B93F

monochromatic

#21205E #322F8B #423FB9 #6C69CC #9997DC

Accessibility & contrast

On white

7.94

#423FB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#423FB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB9

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB9	#FFFFFF	#000000	##FFFFFF
##423FB9	1.00	7.94	2.64	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#004CB7

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #423fb9;
/* rgb */ color: rgb(66, 63, 185);
/* oklch */ color: oklch(45.1% 0.186 277.0);

Tailwind

colors: {
  custom: {
    50: '#8475cf',
    500: '#423fb9',
    950: '#000000',
  },
}

SCSS

$custom: #423fb9;
$custom-light: #8475cf;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb9",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 185
  },
  "hsl": {
    "h": 241.475,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.45084,
    "c": 0.18592,
    "h": 277
  },
  "luminance": 0.08216
}

Semantic roles & 50–950 ramp

primary

#423FB9

secondary

#C6C78D

accent

#D94FD5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423FB9

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

Preview Lab → · Contrast checker → · Palette generator →