#423FA7#423FA7

#423FA7 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.162 H 278.5°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#423FA7
RGB	rgb(66, 63, 167)
HSL	hsl(242, 45%, 45%)
HSV	hsv(242, 62%, 65%)
CMYK	cmyk(60.5%, 62.3%, 0%, 34.5%)
CIE-LAB	lab(32.92, 32.76, -55.74)
CIE-LCH	lch(32.92, 64.65, 300.44°)
OKLab	oklab(43.52% 0.0241 -0.1603)
OKLCH	oklch(43.52% 0.162 278.5)
XYZ	xyz(10.9971, 7.5025, 37.4203)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.31

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA7 #A4A73F

analogous

#3F70A7 #423FA7 #763FA7

triadic

#423FA7 #A7423F #3FA742

tetradic

#423FA7 #A73F70 #A4A73F #3FA776

square

#423FA7 #A73F70 #A4A73F #3FA776

split-complementary

#423FA7 #A7763F #70A73F

monochromatic

#1F1D4E #302E7B #423FA7 #6360C3 #8F8DD4

Accessibility & contrast

On white

8.40

#423FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#423FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA7

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA7	#FFFFFF	#000000	##FFFFFF
##423FA7	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AA

Deuteranopia (green-blind)

#0049A5

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423fa7;
/* rgb */ color: rgb(66, 63, 167);
/* oklch */ color: oklch(43.5% 0.162 278.5);

Tailwind

colors: {
  custom: {
    50: '#8174c2',
    500: '#423fa7',
    950: '#000000',
  },
}

SCSS

$custom: #423fa7;
$custom-light: #8174c2;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa7",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 167
  },
  "hsl": {
    "h": 241.731,
    "s": 45.217,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43521,
    "c": 0.16211,
    "h": 278.5
  },
  "luminance": 0.07503
}

Semantic roles & 50–950 ramp

primary

#423FA7

secondary

#BDBF83

accent

#D553D1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA7

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

Preview Lab → · Contrast checker → · Palette generator →