#423FB3#423FB3

#423FB3 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.178 H 277.5°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#423FB3
RGB	rgb(66, 63, 179)
HSL	hsl(242, 48%, 47%)
HSV	hsv(242, 65%, 70%)
CMYK	cmyk(63.1%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(33.91, 36.78, -61.28)
CIE-LCH	lch(33.91, 71.48, 300.97°)
OKLab	oklab(44.55% 0.0232 -0.1766)
OKLCH	oklch(44.55% 0.178 277.5)
XYZ	xyz(12.1583, 7.9670, 43.5362)
Luminance	0.0797 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.02

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB3 #B0B33F

analogous

#3F76B3 #423FB3 #7C3FB3

triadic

#423FB3 #B3423F #3FB342

tetradic

#423FB3 #B33F76 #B0B33F #3FB37C

square

#423FB3 #B33F76 #B0B33F #3FB37C

split-complementary

#423FB3 #B37C3F #76B33F

monochromatic

#211F58 #312F86 #423FB3 #6966C9 #9593D9

Accessibility & contrast

On white

8.10

#423FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#423FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB3

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB3	#FFFFFF	#000000	##FFFFFF
##423FB3	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#004BB1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423fb3;
/* rgb */ color: rgb(66, 63, 179);
/* oklch */ color: oklch(44.6% 0.178 277.5);

Tailwind

colors: {
  custom: {
    50: '#8374cb',
    500: '#423fb3',
    950: '#000000',
  },
}

SCSS

$custom: #423fb3;
$custom-light: #8374cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb3",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 241.552,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44552,
    "c": 0.17811,
    "h": 277.5
  },
  "luminance": 0.07968
}

Semantic roles & 50–950 ramp

primary

#423FB3

secondary

#C3C489

accent

#D850D4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB3

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

Preview Lab → · Contrast checker → · Palette generator →