#423FB0#423FB0

#423FB0 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.3% C 0.174 H 277.7°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#423FB0
RGB	rgb(66, 63, 176)
HSL	hsl(242, 47%, 47%)
HSV	hsv(242, 64%, 69%)
CMYK	cmyk(62.5%, 64.2%, 0%, 31%)
CIE-LAB	lab(33.66, 35.78, -59.91)
CIE-LCH	lch(33.66, 69.78, 300.85°)
OKLab	oklab(44.29% 0.0235 -0.1726)
OKLCH	oklch(44.29% 0.174 277.7)
XYZ	xyz(11.8582, 7.8469, 41.9556)
Luminance	0.0785 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB0 #ADB03F

analogous

#3F75B0 #423FB0 #7B3FB0

triadic

#423FB0 #B0423F #3FB042

tetradic

#423FB0 #B03F75 #ADB03F #3FB07B

square

#423FB0 #B03F75 #ADB03F #3FB07B

split-complementary

#423FB0 #B07B3F #75B03F

monochromatic

#201F56 #312F83 #423FB0 #6765C8 #9392D8

Accessibility & contrast

On white

8.17

#423FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#423FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB0

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB0	#FFFFFF	#000000	##FFFFFF
##423FB0	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B4

Deuteranopia (green-blind)

#004AAE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423fb0;
/* rgb */ color: rgb(66, 63, 176);
/* oklch */ color: oklch(44.3% 0.174 277.7);

Tailwind

colors: {
  custom: {
    50: '#8374c9',
    500: '#423fb0',
    950: '#000000',
  },
}

SCSS

$custom: #423fb0;
$custom-light: #8374c9;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb0",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 241.593,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.4429,
    "c": 0.17416,
    "h": 277.7
  },
  "luminance": 0.07848
}

Semantic roles & 50–950 ramp

primary

#423FB0

secondary

#C1C388

accent

#D751D3

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB0

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

Preview Lab → · Contrast checker → · Palette generator →