#423FA3#423FA3

#423FA3 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.2% C 0.157 H 278.9°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#423FA3
RGB	rgb(66, 63, 163)
HSL	hsl(242, 44%, 44%)
HSV	hsv(242, 61%, 64%)
CMYK	cmyk(59.5%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(32.61, 31.41, -53.85)
CIE-LCH	lch(32.61, 62.35, 300.26°)
OKLab	oklab(43.19% 0.0243 -0.1548)
OKLCH	oklch(43.19% 0.157 278.9)
XYZ	xyz(10.6330, 7.3569, 35.5029)
Luminance	0.0736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.85

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA3 #A0A33F

analogous

#3F6EA3 #423FA3 #743FA3

triadic

#423FA3 #A3423F #3FA342

tetradic

#423FA3 #A33F6E #A0A33F #3FA374

square

#423FA3 #A33F6E #A0A33F #3FA374

split-complementary

#423FA3 #A3743F #6EA33F

monochromatic

#1E1D4B #302E77 #423FA3 #615EC1 #8D8AD2

Accessibility & contrast

On white

8.50

#423FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#423FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA3

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA3	#FFFFFF	#000000	##FFFFFF
##423FA3	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A6

Deuteranopia (green-blind)

#0049A1

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423fa3;
/* rgb */ color: rgb(66, 63, 163);
/* oklch */ color: oklch(43.2% 0.157 278.9);

Tailwind

colors: {
  custom: {
    50: '#8074bf',
    500: '#423fa3',
    950: '#000000',
  },
}

SCSS

$custom: #423fa3;
$custom-light: #8074bf;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa3",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 241.8,
    "s": 44.248,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43187,
    "c": 0.15666,
    "h": 278.9
  },
  "luminance": 0.07358
}

Semantic roles & 50–950 ramp

primary

#423FA3

secondary

#BBBD81

accent

#D454D0

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA3

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

Preview Lab → · Contrast checker → · Palette generator →