#423AB8#423AB8

#423AB8 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.2% C 0.190 H 278.0°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#423AB8
RGB	rgb(66, 58, 184)
HSL	hsl(244, 52%, 47%)
HSV	hsv(244, 68%, 72%)
CMYK	cmyk(64.1%, 68.5%, 0%, 27.8%)
CIE-LAB	lab(33.23, 41.45, -65.36)
CIE-LCH	lch(33.23, 77.40, 302.38°)
OKLab	oklab(44.19% 0.0266 -0.1886)
OKLCH	oklch(44.19% 0.19 278)
XYZ	xyz(12.4088, 7.6441, 46.1596)
Luminance	0.0765 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.65

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423AB8 #B0B83A

analogous

#3A71B8 #423AB8 #813AB8

triadic

#423AB8 #B8423A #3AB842

tetradic

#423AB8 #B83A71 #B0B83A #3AB881

square

#423AB8 #B83A71 #B0B83A #3AB881

split-complementary

#423AB8 #B8813A #71B83A

monochromatic

#211D5B #312B89 #423AB8 #6962CD #9590DC

Accessibility & contrast

On white

8.30

#423AB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#423AB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AB8

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AB8	#FFFFFF	#000000	##FFFFFF
##423AB8	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423ab8;
/* rgb */ color: rgb(66, 58, 184);
/* oklch */ color: oklch(44.2% 0.190 278.0);

Tailwind

colors: {
  custom: {
    50: '#8571ce',
    500: '#423ab8',
    950: '#000000',
  },
}

SCSS

$custom: #423ab8;
$custom-light: #8571ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423ab8",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 184
  },
  "hsl": {
    "h": 243.81,
    "s": 52.066,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44191,
    "c": 0.19042,
    "h": 278
  },
  "luminance": 0.07645
}

Semantic roles & 50–950 ramp

primary

#423AB8

secondary

#C3C787

accent

#DC4CD2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423AB8

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

Preview Lab → · Contrast checker → · Palette generator →