#423F9D#423F9D

#423F9D is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.148 H 279.5°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#423F9D
RGB	rgb(66, 63, 157)
HSL	hsl(242, 43%, 43%)
HSV	hsv(242, 60%, 62%)
CMYK	cmyk(58%, 59.9%, 0%, 38.4%)
CIE-LAB	lab(32.14, 29.40, -50.99)
CIE-LCH	lch(32.14, 58.86, 299.96°)
OKLab	oklab(42.7% 0.0245 -0.1463)
OKLCH	oklch(42.7% 0.148 279.5)
XYZ	xyz(10.1082, 7.1469, 32.7386)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423F9D #9A9D3F

analogous

#3F6B9D #423F9D #713F9D

triadic

#423F9D #9D423F #3F9D42

tetradic

#423F9D #9D3F6B #9A9D3F #3F9D71

square

#423F9D #9D3F6B #9A9D3F #3F9D71

split-complementary

#423F9D #9D713F #6B9D3F

monochromatic

#1D1C46 #302D71 #423F9D #5F5CBD #8A87CF

Accessibility & contrast

On white

8.64

#423F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#423F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423F9D

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423F9D	#FFFFFF	#000000	##FFFFFF
##423F9D	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA0

Deuteranopia (green-blind)

#00489B

Tritanopia (blue-blind)

#0E5568

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #423f9d;
/* rgb */ color: rgb(66, 63, 157);
/* oklch */ color: oklch(42.7% 0.148 279.5);

Tailwind

colors: {
  custom: {
    50: '#7f74bb',
    500: '#423f9d',
    950: '#000000',
  },
}

SCSS

$custom: #423f9d;
$custom-light: #7f74bb;
$custom-dark: #000000;

JSON

{
  "hex": "#423f9d",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 157
  },
  "hsl": {
    "h": 241.915,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42696,
    "c": 0.14838,
    "h": 279.5
  },
  "luminance": 0.07148
}

Semantic roles & 50–950 ramp

primary

#423F9D

secondary

#B8BA7E

accent

#D355CF

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423F9D

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

Preview Lab → · Contrast checker → · Palette generator →