#423EB3#423EB3

#423EB3 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.179 H 277.7°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#423EB3
RGB	rgb(66, 62, 179)
HSL	hsl(242, 49%, 47%)
HSV	hsv(242, 65%, 70%)
CMYK	cmyk(63.1%, 65.4%, 0%, 29.8%)
CIE-LAB	lab(33.68, 37.40, -61.66)
CIE-LCH	lch(33.68, 72.11, 301.24°)
OKLab	oklab(44.39% 0.024 -0.1777)
OKLCH	oklch(44.39% 0.179 277.7)
XYZ	xyz(12.1034, 7.8572, 43.5179)
Luminance	0.0786 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423EB3 #AFB33E

analogous

#3E75B3 #423EB3 #7C3EB3

triadic

#423EB3 #B3423E #3EB342

tetradic

#423EB3 #B33E75 #AFB33E #3EB37C

square

#423EB3 #B33E75 #AFB33E #3EB37C

split-complementary

#423EB3 #B37C3E #75B33E

monochromatic

#201F58 #312E86 #423EB3 #6865CA #9592D9

Accessibility & contrast

On white

8.17

#423EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#423EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423EB3

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423EB3	#FFFFFF	#000000	##FFFFFF
##423EB3	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)

#0054B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423eb3;
/* rgb */ color: rgb(66, 62, 179);
/* oklch */ color: oklch(44.4% 0.179 277.7);

Tailwind

colors: {
  custom: {
    50: '#8374cb',
    500: '#423eb3',
    950: '#000000',
  },
}

SCSS

$custom: #423eb3;
$custom-light: #8374cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423eb3",
  "rgb": {
    "r": 66,
    "g": 62,
    "b": 179
  },
  "hsl": {
    "h": 242.051,
    "s": 48.548,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44385,
    "c": 0.17932,
    "h": 277.7
  },
  "luminance": 0.07858
}

Semantic roles & 50–950 ramp

primary

#423EB3

secondary

#C2C588

accent

#D850D3

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423EB3

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

Preview Lab → · Contrast checker → · Palette generator →