#423DB1#423DB1

#423DB1 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.178 H 278.1°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#423DB1
RGB	rgb(66, 61, 177)
HSL	hsl(243, 49%, 47%)
HSV	hsv(243, 66%, 69%)
CMYK	cmyk(62.7%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(33.28, 37.34, -61.13)
CIE-LCH	lch(33.28, 71.63, 301.42°)
OKLab	oklab(44.04% 0.0251 -0.1761)
OKLCH	oklch(44.04% 0.178 278.1)
XYZ	xyz(11.8488, 7.6691, 42.4423)
Luminance	0.0767 (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

#423DB1 #ACB13D

analogous

#3D72B1 #423DB1 #7C3DB1

triadic

#423DB1 #B1423D #3DB142

tetradic

#423DB1 #B13D72 #ACB13D #3DB17C

square

#423DB1 #B13D72 #ACB13D #3DB17C

split-complementary

#423DB1 #B17C3D #72B13D

monochromatic

#201E56 #312D83 #423DB1 #6762C9 #9390D9

Accessibility & contrast

On white

8.29

#423DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#423DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB1

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB1	#FFFFFF	#000000	##FFFFFF
##423DB1	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423db1;
/* rgb */ color: rgb(66, 61, 177);
/* oklch */ color: oklch(44.0% 0.178 278.1);

Tailwind

colors: {
  custom: {
    50: '#8373c9',
    500: '#423db1',
    950: '#000000',
  },
}

SCSS

$custom: #423db1;
$custom-light: #8373c9;
$custom-dark: #000000;

JSON

{
  "hex": "#423db1",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 242.586,
    "s": 48.739,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44041,
    "c": 0.1779,
    "h": 278.1
  },
  "luminance": 0.0767
}

Semantic roles & 50–950 ramp

primary

#423DB1

secondary

#C1C486

accent

#D850D2

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423DB1

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

Preview Lab → · Contrast checker → · Palette generator →