#423FA4#423FA4

#423FA4 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.158 H 278.8°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#423FA4
RGB	rgb(66, 63, 164)
HSL	hsl(242, 44%, 45%)
HSV	hsv(242, 62%, 64%)
CMYK	cmyk(59.8%, 61.6%, 0%, 35.7%)
CIE-LAB	lab(32.68, 31.75, -54.33)
CIE-LCH	lch(32.68, 62.92, 300.30°)
OKLab	oklab(43.27% 0.0242 -0.1562)
OKLCH	oklch(43.27% 0.158 278.8)
XYZ	xyz(10.7230, 7.3928, 35.9767)
Luminance	0.0739 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.71

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA4 #A1A43F

analogous

#3F6FA4 #423FA4 #753FA4

triadic

#423FA4 #A4423F #3FA442

tetradic

#423FA4 #A43F6F #A1A43F #3FA475

square

#423FA4 #A43F6F #A1A43F #3FA475

split-complementary

#423FA4 #A4753F #6FA43F

monochromatic

#1E1D4C #302E78 #423FA4 #625FC1 #8D8BD2

Accessibility & contrast

On white

8.47

#423FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#423FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA4

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA4	#FFFFFF	#000000	##FFFFFF
##423FA4	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A7

Deuteranopia (green-blind)

#0049A2

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423fa4;
/* rgb */ color: rgb(66, 63, 164);
/* oklch */ color: oklch(43.3% 0.158 278.8);

Tailwind

colors: {
  custom: {
    50: '#8074c0',
    500: '#423fa4',
    950: '#000000',
  },
}

SCSS

$custom: #423fa4;
$custom-light: #8074c0;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa4",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 164
  },
  "hsl": {
    "h": 241.782,
    "s": 44.493,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4327,
    "c": 0.15803,
    "h": 278.8
  },
  "luminance": 0.07394
}

Semantic roles & 50–950 ramp

primary

#423FA4

secondary

#BBBD82

accent

#D454D0

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA4

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

Preview Lab → · Contrast checker → · Palette generator →