#423CB5#423CB5

#423CB5 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.2% C 0.184 H 277.9°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#423CB5
RGB	rgb(66, 60, 181)
HSL	hsl(243, 50%, 47%)
HSV	hsv(243, 67%, 71%)
CMYK	cmyk(63.5%, 66.9%, 0%, 29%)
CIE-LAB	lab(33.40, 39.27, -63.30)
CIE-LCH	lch(33.40, 74.50, 301.82°)
OKLab	oklab(44.24% 0.0254 -0.1825)
OKLCH	oklch(44.24% 0.184 277.9)
XYZ	xyz(12.2004, 7.7252, 44.5553)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.30

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423CB5 #AFB53C

analogous

#3C73B5 #423CB5 #7E3CB5

triadic

#423CB5 #B5423C #3CB542

tetradic

#423CB5 #B53C73 #AFB53C #3CB57E

square

#423CB5 #B53C73 #AFB53C #3CB57E

split-complementary

#423CB5 #B57E3C #73B53C

monochromatic

#201E59 #312D87 #423CB5 #6863CB #9591DB

Accessibility & contrast

On white

8.25

#423CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#423CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CB5

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CB5	#FFFFFF	#000000	##FFFFFF
##423CB5	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#004AB3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423cb5;
/* rgb */ color: rgb(66, 60, 181);
/* oklch */ color: oklch(44.2% 0.184 277.9);

Tailwind

colors: {
  custom: {
    50: '#8472cc',
    500: '#423cb5',
    950: '#000000',
  },
}

SCSS

$custom: #423cb5;
$custom-light: #8472cc;
$custom-dark: #000000;

JSON

{
  "hex": "#423cb5",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 181
  },
  "hsl": {
    "h": 242.975,
    "s": 50.207,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44235,
    "c": 0.18428,
    "h": 277.9
  },
  "luminance": 0.07726
}

Semantic roles & 50–950 ramp

primary

#423CB5

secondary

#C2C687

accent

#DA4ED3

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423CB5

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

Preview Lab → · Contrast checker → · Palette generator →