#423ABB#423ABB

#423ABB is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.5% C 0.194 H 277.7°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#423ABB
RGB	rgb(66, 58, 187)
HSL	hsl(244, 53%, 48%)
HSV	hsv(244, 69%, 73%)
CMYK	cmyk(64.7%, 69%, 0%, 26.7%)
CIE-LAB	lab(33.50, 42.43, -66.69)
CIE-LCH	lch(33.50, 79.04, 302.46°)
OKLab	oklab(44.47% 0.0262 -0.1924)
OKLCH	oklch(44.47% 0.194 277.7)
XYZ	xyz(12.7266, 7.7712, 47.8334)
Luminance	0.0777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.72

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423ABB #B3BB3A

analogous

#3A72BB #423ABB #823ABB

triadic

#423ABB #BB423A #3ABB42

tetradic

#423ABB #BB3A72 #B3BB3A #3ABB82

square

#423ABB #BB3A72 #B3BB3A #3ABB82

split-complementary

#423ABB #BB823A #72BB3A

monochromatic

#211D5E #322C8C #423ABB #6A63CF #9792DD

Accessibility & contrast

On white

8.22

#423ABB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#423ABB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423ABB

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423ABB	#FFFFFF	#000000	##FFFFFF
##423ABB	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0049B9

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423abb;
/* rgb */ color: rgb(66, 58, 187);
/* oklch */ color: oklch(44.5% 0.194 277.7);

Tailwind

colors: {
  custom: {
    50: '#8571d1',
    500: '#423abb',
    950: '#000000',
  },
}

SCSS

$custom: #423abb;
$custom-light: #8571d1;
$custom-dark: #000000;

JSON

{
  "hex": "#423abb",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 187
  },
  "hsl": {
    "h": 243.721,
    "s": 52.653,
    "l": 48.039
  },
  "oklch": {
    "l": 0.4447,
    "c": 0.19421,
    "h": 277.7
  },
  "luminance": 0.07772
}

Semantic roles & 50–950 ramp

primary

#423ABB

secondary

#C4C888

accent

#DC4CD3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #423ABB

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

Preview Lab → · Contrast checker → · Palette generator →