#423FA8#423FA8

#423FA8 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.163 H 278.4°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#423FA8
RGB	rgb(66, 63, 168)
HSL	hsl(242, 45%, 45%)
HSV	hsv(242, 63%, 66%)
CMYK	cmyk(60.7%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(33.01, 33.10, -56.21)
CIE-LCH	lch(33.01, 65.23, 300.49°)
OKLab	oklab(43.61% 0.024 -0.1617)
OKLCH	oklch(43.61% 0.163 278.4)
XYZ	xyz(11.0899, 7.5396, 37.9091)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.18

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FA8 #A5A83F

analogous

#3F71A8 #423FA8 #763FA8

triadic

#423FA8 #A8423F #3FA842

tetradic

#423FA8 #A83F71 #A5A83F #3FA876

square

#423FA8 #A83F71 #A5A83F #3FA876

split-complementary

#423FA8 #A8763F #71A83F

monochromatic

#1F1E4F #312E7B #423FA8 #6361C4 #8F8DD4

Accessibility & contrast

On white

8.37

#423FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#423FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA8

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA8	#FFFFFF	#000000	##FFFFFF
##423FA8	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AB

Deuteranopia (green-blind)

#0049A6

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423fa8;
/* rgb */ color: rgb(66, 63, 168);
/* oklch */ color: oklch(43.6% 0.163 278.4);

Tailwind

colors: {
  custom: {
    50: '#8174c3',
    500: '#423fa8',
    950: '#000000',
  },
}

SCSS

$custom: #423fa8;
$custom-light: #8174c3;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa8",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 241.714,
    "s": 45.455,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43605,
    "c": 0.16346,
    "h": 278.4
  },
  "luminance": 0.0754
}

Semantic roles & 50–950 ramp

primary

#423FA8

secondary

#BDBF84

accent

#D553D1

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #423FA8

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

Preview Lab → · Contrast checker → · Palette generator →