#423DB3#423DB3

#423DB3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.2% C 0.181 H 277.9°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#423DB3
RGB	rgb(66, 61, 179)
HSL	hsl(243, 49%, 47%)
HSV	hsv(243, 66%, 70%)
CMYK	cmyk(63.1%, 65.9%, 0%, 29.8%)
CIE-LAB	lab(33.46, 38.01, -62.03)
CIE-LCH	lch(33.46, 72.75, 301.50°)
OKLab	oklab(44.22% 0.0249 -0.1788)
OKLCH	oklch(44.22% 0.181 277.9)
XYZ	xyz(12.0496, 7.7495, 43.4999)
Luminance	0.0775 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.20

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DB3 #AEB33D

analogous

#3D73B3 #423DB3 #7D3DB3

triadic

#423DB3 #B3423D #3DB342

tetradic

#423DB3 #B33D73 #AEB33D #3DB37D

square

#423DB3 #B33D73 #AEB33D #3DB37D

split-complementary

#423DB3 #B37D3D #73B33D

monochromatic

#201E58 #312D85 #423DB3 #6863CA #9491D9

Accessibility & contrast

On white

8.24

#423DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#423DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB3

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB3	#FFFFFF	#000000	##FFFFFF
##423DB3	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)

#0054B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423db3;
/* rgb */ color: rgb(66, 61, 179);
/* oklch */ color: oklch(44.2% 0.181 277.9);

Tailwind

colors: {
  custom: {
    50: '#8373cb',
    500: '#423db3',
    950: '#000000',
  },
}

SCSS

$custom: #423db3;
$custom-light: #8373cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423db3",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 179
  },
  "hsl": {
    "h": 242.542,
    "s": 49.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44219,
    "c": 0.18051,
    "h": 277.9
  },
  "luminance": 0.0775
}

Semantic roles & 50–950 ramp

primary

#423DB3

secondary

#C2C587

accent

#D94FD3

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423DB3

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

Preview Lab → · Contrast checker → · Palette generator →