#423FA5#423FA5

#423FA5 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.159 H 278.7°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#423FA5
RGB	rgb(66, 63, 165)
HSL	hsl(242, 45%, 45%)
HSV	hsv(242, 62%, 65%)
CMYK	cmyk(60%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(32.76, 32.09, -54.80)
CIE-LCH	lch(32.76, 63.50, 300.35°)
OKLab	oklab(43.35% 0.0242 -0.1575)
OKLCH	oklch(43.35% 0.159 278.7)
XYZ	xyz(10.8136, 7.4291, 36.4541)
Luminance	0.0743 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.58

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA5 #A2A53F

analogous

#3F6FA5 #423FA5 #753FA5

triadic

#423FA5 #A5423F #3FA542

tetradic

#423FA5 #A53F6F #A2A53F #3FA575

square

#423FA5 #A53F6F #A2A53F #3FA575

split-complementary

#423FA5 #A5753F #6FA53F

monochromatic

#1F1D4C #302E79 #423FA5 #625FC2 #8E8CD3

Accessibility & contrast

On white

8.45

#423FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#423FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA5

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA5	#FFFFFF	#000000	##FFFFFF
##423FA5	1.00	8.45	2.49	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A8

Deuteranopia (green-blind)

#0049A3

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423fa5;
/* rgb */ color: rgb(66, 63, 165);
/* oklch */ color: oklch(43.4% 0.159 278.7);

Tailwind

colors: {
  custom: {
    50: '#8174c0',
    500: '#423fa5',
    950: '#000000',
  },
}

SCSS

$custom: #423fa5;
$custom-light: #8174c0;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa5",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 241.765,
    "s": 44.737,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43353,
    "c": 0.15939,
    "h": 278.7
  },
  "luminance": 0.0743
}

Semantic roles & 50–950 ramp

primary

#423FA5

secondary

#BCBE82

accent

#D453D1

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423FA5

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

Preview Lab → · Contrast checker → · Palette generator →