#423BBA#423BBA

#423BBA is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.5% C 0.192 H 277.7°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#423BBA
RGB	rgb(66, 59, 186)
HSL	hsl(243, 52%, 48%)
HSV	hsv(243, 68%, 73%)
CMYK	cmyk(64.5%, 68.3%, 0%, 27.1%)
CIE-LAB	lab(33.63, 41.51, -65.90)
CIE-LCH	lch(33.63, 77.88, 302.21°)
OKLab	oklab(44.53% 0.0256 -0.1901)
OKLCH	oklch(44.53% 0.192 277.7)
XYZ	xyz(12.6708, 7.8303, 47.2885)
Luminance	0.0783 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.52

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BBA #B3BA3B

analogous

#3B73BA #423BBA #813BBA

triadic

#423BBA #BA423B #3BBA42

tetradic

#423BBA #BA3B73 #B3BA3B #3BBA81

square

#423BBA #BA3B73 #B3BA3B #3BBA81

split-complementary

#423BBA #BA813B #73BA3B

monochromatic

#211E5D #322C8C #423BBA #6A64CE #9793DD

Accessibility & contrast

On white

8.18

#423BBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#423BBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BBA

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BBA	#FFFFFF	#000000	##FFFFFF
##423BBA	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BE

Deuteranopia (green-blind)

#004AB8

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423bba;
/* rgb */ color: rgb(66, 59, 186);
/* oklch */ color: oklch(44.5% 0.192 277.7);

Tailwind

colors: {
  custom: {
    50: '#8572d0',
    500: '#423bba',
    950: '#000000',
  },
}

SCSS

$custom: #423bba;
$custom-light: #8572d0;
$custom-dark: #000000;

JSON

{
  "hex": "#423bba",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 186
  },
  "hsl": {
    "h": 243.307,
    "s": 51.837,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44532,
    "c": 0.19183,
    "h": 277.7
  },
  "luminance": 0.07831
}

Semantic roles & 50–950 ramp

primary

#423BBA

secondary

#C4C889

accent

#DB4DD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423BBA

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

Preview Lab → · Contrast checker → · Palette generator →