#423F8A#423F8A

#423F8A is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.2% C 0.121 H 281.5°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#423F8A
RGB	rgb(66, 63, 138)
HSL	hsl(242, 37%, 39%)
HSV	hsv(242, 54%, 54%)
CMYK	cmyk(52.2%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(30.75, 23.03, -41.61)
CIE-LCH	lch(30.75, 47.56, 298.96°)
OKLab	oklab(41.23% 0.0241 -0.1188)
OKLCH	oklch(41.23% 0.121 281.5)
XYZ	xyz(8.6103, 6.5478, 24.8500)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423F8A #878A3F

analogous

#3F628A #423F8A #683F8A

triadic

#423F8A #8A423F #3F8A42

tetradic

#423F8A #8A3F62 #878A3F #3F8A68

square

#423F8A #8A3F62 #878A3F #3F8A68

split-complementary

#423F8A #8A683F #628A3F

monochromatic

#1A1936 #2E2C60 #423F8A #5955B1 #827FC5

Accessibility & contrast

On white

9.09

#423F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#423F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423F8A

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423F8A	#FFFFFF	#000000	##FFFFFF
##423F8A	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174B8D

Deuteranopia (green-blind)

#0F4688

Tritanopia (blue-blind)

#26505E

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #423f8a;
/* rgb */ color: rgb(66, 63, 138);
/* oklch */ color: oklch(41.2% 0.121 281.5);

Tailwind

colors: {
  custom: {
    50: '#7c74ad',
    500: '#423f8a',
    950: '#000000',
  },
}

SCSS

$custom: #423f8a;
$custom-light: #7c74ad;
$custom-dark: #000000;

JSON

{
  "hex": "#423f8a",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 242.4,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.41227,
    "c": 0.12118,
    "h": 281.5
  },
  "luminance": 0.06548
}

Semantic roles & 50–950 ramp

primary

#423F8A

secondary

#ACAF76

accent

#CD5BC9

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #423F8A

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

Preview Lab → · Contrast checker → · Palette generator →