#423FA1#423FA1

#423FA1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.0% C 0.154 H 279.1°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#423FA1
RGB	rgb(66, 63, 161)
HSL	hsl(242, 44%, 44%)
HSV	hsv(242, 61%, 63%)
CMYK	cmyk(59%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(32.45, 30.74, -52.90)
CIE-LCH	lch(32.45, 61.19, 300.16°)
OKLab	oklab(43.02% 0.0243 -0.152)
OKLCH	oklch(43.02% 0.154 279.1)
XYZ	xyz(10.4553, 7.2857, 34.5666)
Luminance	0.0729 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.13

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA1 #9EA13F

analogous

#3F6DA1 #423FA1 #733FA1

triadic

#423FA1 #A1423F #3FA142

tetradic

#423FA1 #A13F6D #9EA13F #3FA173

square

#423FA1 #A13F6D #9EA13F #3FA173

split-complementary

#423FA1 #A1733F #6DA13F

monochromatic

#1E1D49 #302E75 #423FA1 #605DC0 #8C89D1

Accessibility & contrast

On white

8.55

#423FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#423FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA1

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA1	#FFFFFF	#000000	##FFFFFF
##423FA1	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A4

Deuteranopia (green-blind)

#00489F

Tritanopia (blue-blind)

#03576A

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #423fa1;
/* rgb */ color: rgb(66, 63, 161);
/* oklch */ color: oklch(43.0% 0.154 279.1);

Tailwind

colors: {
  custom: {
    50: '#8074be',
    500: '#423fa1',
    950: '#000000',
  },
}

SCSS

$custom: #423fa1;
$custom-light: #8074be;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa1",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 241.837,
    "s": 43.75,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43022,
    "c": 0.15392,
    "h": 279.1
  },
  "luminance": 0.07286
}

Semantic roles & 50–950 ramp

primary

#423FA1

secondary

#BABC80

accent

#D354D0

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA1

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

Preview Lab → · Contrast checker → · Palette generator →