#423FA0#423FA0

#423FA0 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.9% C 0.153 H 279.2°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#423FA0
RGB	rgb(66, 63, 160)
HSL	hsl(242, 43%, 44%)
HSV	hsv(242, 61%, 63%)
CMYK	cmyk(58.8%, 60.6%, 0%, 37.3%)
CIE-LAB	lab(32.37, 30.40, -52.43)
CIE-LCH	lch(32.37, 60.61, 300.11°)
OKLab	oklab(42.94% 0.0244 -0.1506)
OKLCH	oklch(42.94% 0.153 279.2)
XYZ	xyz(10.3674, 7.2506, 34.1041)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.27

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA0 #9DA03F

analogous

#3F6CA0 #423FA0 #723FA0

triadic

#423FA0 #A0423F #3FA042

tetradic

#423FA0 #A03F6C #9DA03F #3FA072

square

#423FA0 #A03F6C #9DA03F #3FA072

split-complementary

#423FA0 #A0723F #6CA03F

monochromatic

#1E1C48 #302E74 #423FA0 #605DBF #8B89D0

Accessibility & contrast

On white

8.57

#423FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#423FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA0

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA0	#FFFFFF	#000000	##FFFFFF
##423FA0	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A3

Deuteranopia (green-blind)

#00489E

Tritanopia (blue-blind)

#065669

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #423fa0;
/* rgb */ color: rgb(66, 63, 160);
/* oklch */ color: oklch(42.9% 0.153 279.2);

Tailwind

colors: {
  custom: {
    50: '#8074bd',
    500: '#423fa0',
    950: '#000000',
  },
}

SCSS

$custom: #423fa0;
$custom-light: #8074bd;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa0",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 160
  },
  "hsl": {
    "h": 241.856,
    "s": 43.498,
    "l": 43.725
  },
  "oklch": {
    "l": 0.4294,
    "c": 0.15253,
    "h": 279.2
  },
  "luminance": 0.07251
}

Semantic roles & 50–950 ramp

primary

#423FA0

secondary

#B9BB80

accent

#D355CF

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA0

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

Preview Lab → · Contrast checker → · Palette generator →