#423BB8#423BB8

#423BB8 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.189 H 277.8°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#423BB8
RGB	rgb(66, 59, 184)
HSL	hsl(243, 51%, 48%)
HSV	hsv(243, 68%, 72%)
CMYK	cmyk(64.1%, 67.9%, 0%, 27.8%)
CIE-LAB	lab(33.45, 40.86, -65.01)
CIE-LCH	lch(33.45, 76.78, 302.15°)
OKLab	oklab(44.35% 0.0258 -0.1875)
OKLCH	oklch(44.35% 0.189 277.8)
XYZ	xyz(12.4597, 7.7459, 46.1766)
Luminance	0.0775 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.48

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BB8 #B1B83B

analogous

#3B72B8 #423BB8 #803BB8

triadic

#423BB8 #B8423B #3BB842

tetradic

#423BB8 #B83B72 #B1B83B #3BB880

square

#423BB8 #B83B72 #B1B83B #3BB880

split-complementary

#423BB8 #B8803B #72B83B

monochromatic

#211D5B #312C8A #423BB8 #6963CD #9692DC

Accessibility & contrast

On white

8.24

#423BB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#423BB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB8

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB8	#FFFFFF	#000000	##FFFFFF
##423BB8	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423bb8;
/* rgb */ color: rgb(66, 59, 184);
/* oklch */ color: oklch(44.3% 0.189 277.8);

Tailwind

colors: {
  custom: {
    50: '#8572ce',
    500: '#423bb8',
    950: '#000000',
  },
}

SCSS

$custom: #423bb8;
$custom-light: #8572ce;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb8",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 184
  },
  "hsl": {
    "h": 243.36,
    "s": 51.44,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44348,
    "c": 0.18929,
    "h": 277.8
  },
  "luminance": 0.07747
}

Semantic roles & 50–950 ramp

primary

#423BB8

secondary

#C3C788

accent

#DB4DD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423BB8

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

Preview Lab → · Contrast checker → · Palette generator →