#423CB1#423CB1

#423CB1 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.9% C 0.179 H 278.3°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#423CB1
RGB	rgb(66, 60, 177)
HSL	hsl(243, 49%, 46%)
HSV	hsv(243, 66%, 69%)
CMYK	cmyk(62.7%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(33.06, 37.95, -61.50)
CIE-LCH	lch(33.06, 72.27, 301.68°)
OKLab	oklab(43.88% 0.0259 -0.1772)
OKLCH	oklch(43.88% 0.179 278.3)
XYZ	xyz(11.7959, 7.5634, 42.4247)
Luminance	0.0756 (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

#423CB1 #ABB13C

analogous

#3C71B1 #423CB1 #7D3CB1

triadic

#423CB1 #B1423C #3CB142

tetradic

#423CB1 #B13C71 #ABB13C #3CB17D

square

#423CB1 #B13C71 #ABB13C #3CB17D

split-complementary

#423CB1 #B17D3C #71B13C

monochromatic

#201D56 #312D83 #423CB1 #6661C9 #928FD9

Accessibility & contrast

On white

8.36

#423CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#423CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CB1

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CB1	#FFFFFF	#000000	##FFFFFF
##423CB1	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423cb1;
/* rgb */ color: rgb(66, 60, 177);
/* oklch */ color: oklch(43.9% 0.179 278.3);

Tailwind

colors: {
  custom: {
    50: '#8372c9',
    500: '#423cb1',
    950: '#000000',
  },
}

SCSS

$custom: #423cb1;
$custom-light: #8372c9;
$custom-dark: #000000;

JSON

{
  "hex": "#423cb1",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 243.077,
    "s": 49.367,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43876,
    "c": 0.17911,
    "h": 278.3
  },
  "luminance": 0.07564
}

Semantic roles & 50–950 ramp

primary

#423CB1

secondary

#C0C485

accent

#D94FD2

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423CB1

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

Preview Lab → · Contrast checker → · Palette generator →