#423DB7#423DB7

#423DB7 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.6% C 0.186 H 277.6°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#423DB7
RGB	rgb(66, 61, 183)
HSL	hsl(242, 50%, 48%)
HSV	hsv(242, 67%, 72%)
CMYK	cmyk(63.9%, 66.7%, 0%, 28.2%)
CIE-LAB	lab(33.80, 39.33, -63.84)
CIE-LCH	lch(33.80, 74.98, 301.64°)
OKLab	oklab(44.58% 0.0244 -0.1841)
OKLCH	oklch(44.58% 0.186 277.6)
XYZ	xyz(12.4600, 7.9136, 45.6614)
Luminance	0.0791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.17

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DB7 #B2B73D

analogous

#3D75B7 #423DB7 #7F3DB7

triadic

#423DB7 #B7423D #3DB742

tetradic

#423DB7 #B73D75 #B2B73D #3DB77F

square

#423DB7 #B73D75 #B2B73D #3DB77F

split-complementary

#423DB7 #B77F3D #75B73D

monochromatic

#211E5B #312E89 #423DB7 #6A65CC #9693DB

Accessibility & contrast

On white

8.13

#423DB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#423DB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB7

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB7	#FFFFFF	#000000	##FFFFFF
##423DB7	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#004AB5

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423db7;
/* rgb */ color: rgb(66, 61, 183);
/* oklch */ color: oklch(44.6% 0.186 277.6);

Tailwind

colors: {
  custom: {
    50: '#8473ce',
    500: '#423db7',
    950: '#000000',
  },
}

SCSS

$custom: #423db7;
$custom-light: #8473ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423db7",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 183
  },
  "hsl": {
    "h": 242.459,
    "s": 50,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44577,
    "c": 0.18569,
    "h": 277.6
  },
  "luminance": 0.07915
}

Semantic roles & 50–950 ramp

primary

#423DB7

secondary

#C4C689

accent

#DA4ED4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423DB7

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

Preview Lab → · Contrast checker → · Palette generator →