#423FB1#423FB1

#423FB1 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.175 H 277.7°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#423FB1
RGB	rgb(66, 63, 177)
HSL	hsl(242, 48%, 47%)
HSV	hsv(242, 64%, 69%)
CMYK	cmyk(62.7%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(33.75, 36.12, -60.37)
CIE-LCH	lch(33.75, 70.35, 300.89°)
OKLab	oklab(44.38% 0.0234 -0.1739)
OKLCH	oklch(44.38% 0.175 277.7)
XYZ	xyz(11.9575, 7.8866, 42.4786)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB1 #AEB13F

analogous

#3F75B1 #423FB1 #7B3FB1

triadic

#423FB1 #B1423F #3FB142

tetradic

#423FB1 #B13F75 #AEB13F #3FB17B

square

#423FB1 #B13F75 #AEB13F #3FB17B

split-complementary

#423FB1 #B17B3F #75B13F

monochromatic

#201F57 #312F84 #423FB1 #6865C8 #9492D8

Accessibility & contrast

On white

8.15

#423FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#423FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB1

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB1	#FFFFFF	#000000	##FFFFFF
##423FB1	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#004BAF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423fb1;
/* rgb */ color: rgb(66, 63, 177);
/* oklch */ color: oklch(44.4% 0.175 277.7);

Tailwind

colors: {
  custom: {
    50: '#8374c9',
    500: '#423fb1',
    950: '#000000',
  },
}

SCSS

$custom: #423fb1;
$custom-light: #8374c9;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb1",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 241.579,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44377,
    "c": 0.17547,
    "h": 277.7
  },
  "luminance": 0.07888
}

Semantic roles & 50–950 ramp

primary

#423FB1

secondary

#C2C488

accent

#D751D4

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB1

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

Preview Lab → · Contrast checker → · Palette generator →