#423CB2#423CB2

#423CB2 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.0% C 0.180 H 278.2°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#423CB2
RGB	rgb(66, 60, 178)
HSL	hsl(243, 50%, 47%)
HSV	hsv(243, 66%, 70%)
CMYK	cmyk(62.9%, 66.3%, 0%, 30.2%)
CIE-LAB	lab(33.14, 38.28, -61.95)
CIE-LCH	lch(33.14, 72.82, 301.71°)
OKLab	oklab(43.97% 0.0258 -0.1786)
OKLCH	oklch(43.97% 0.18 278.2)
XYZ	xyz(11.8959, 7.6034, 42.9516)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.36

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423CB2 #ACB23C

analogous

#3C71B2 #423CB2 #7D3CB2

triadic

#423CB2 #B2423C #3CB242

tetradic

#423CB2 #B23C71 #ACB23C #3CB27D

square

#423CB2 #B23C71 #ACB23C #3CB27D

split-complementary

#423CB2 #B27D3C #71B23C

monochromatic

#201D56 #312D84 #423CB2 #6761CA #938FD9

Accessibility & contrast

On white

8.33

#423CB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#423CB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CB2

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CB2	#FFFFFF	#000000	##FFFFFF
##423CB2	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B6

Deuteranopia (green-blind)

#0049B0

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423cb2;
/* rgb */ color: rgb(66, 60, 178);
/* oklch */ color: oklch(44.0% 0.180 278.2);

Tailwind

colors: {
  custom: {
    50: '#8372ca',
    500: '#423cb2',
    950: '#000000',
  },
}

SCSS

$custom: #423cb2;
$custom-light: #8372ca;
$custom-dark: #000000;

JSON

{
  "hex": "#423cb2",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 178
  },
  "hsl": {
    "h": 243.051,
    "s": 49.58,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43965,
    "c": 0.18041,
    "h": 278.2
  },
  "luminance": 0.07604
}

Semantic roles & 50–950 ramp

primary

#423CB2

secondary

#C1C486

accent

#D94FD2

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423CB2

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

Preview Lab → · Contrast checker → · Palette generator →