#423DB9#423DB9

#423DB9 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.8% C 0.188 H 277.4°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#423DB9
RGB	rgb(66, 61, 185)
HSL	hsl(242, 50%, 48%)
HSV	hsv(242, 67%, 73%)
CMYK	cmyk(64.3%, 67%, 0%, 27.5%)
CIE-LAB	lab(33.98, 39.99, -64.73)
CIE-LCH	lch(33.98, 76.09, 301.71°)
OKLab	oklab(44.76% 0.0242 -0.1867)
OKLCH	oklch(44.76% 0.188 277.4)
XYZ	xyz(12.6696, 7.9975, 46.7655)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.20

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DB9 #B4B93D

analogous

#3D76B9 #423DB9 #803DB9

triadic

#423DB9 #B9423D #3DB942

tetradic

#423DB9 #B93D76 #B4B93D #3DB980

square

#423DB9 #B93D76 #B4B93D #3DB980

split-complementary

#423DB9 #B9803D #76B93D

monochromatic

#211F5D #322E8B #423DB9 #6B66CD #9795DC

Accessibility & contrast

On white

8.08

#423DB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#423DB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB9

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB9	#FFFFFF	#000000	##FFFFFF
##423DB9	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#004BB7

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423db9;
/* rgb */ color: rgb(66, 61, 185);
/* oklch */ color: oklch(44.8% 0.188 277.4);

Tailwind

colors: {
  custom: {
    50: '#8573cf',
    500: '#423db9',
    950: '#000000',
  },
}

SCSS

$custom: #423db9;
$custom-light: #8573cf;
$custom-dark: #000000;

JSON

{
  "hex": "#423db9",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 185
  },
  "hsl": {
    "h": 242.419,
    "s": 50.407,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44758,
    "c": 0.18826,
    "h": 277.4
  },
  "luminance": 0.07999
}

Semantic roles & 50–950 ramp

primary

#423DB9

secondary

#C5C78B

accent

#DA4ED4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423DB9

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

Preview Lab → · Contrast checker → · Palette generator →