#423D9D#423D9D

#423D9D is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.151 H 280.1°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#423D9D
RGB	rgb(66, 61, 157)
HSL	hsl(243, 44%, 43%)
HSV	hsv(243, 61%, 62%)
CMYK	cmyk(58%, 61.1%, 0%, 38.4%)
CIE-LAB	lab(31.65, 30.67, -51.79)
CIE-LCH	lch(31.65, 60.19, 300.63°)
OKLab	oklab(42.33% 0.0265 -0.1487)
OKLCH	oklch(42.33% 0.151 280.1)
XYZ	xyz(9.9994, 6.9294, 32.7023)
Luminance	0.0693 (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

#423D9D #989D3D

analogous

#3D689D #423D9D #723D9D

triadic

#423D9D #9D423D #3D9D42

tetradic

#423D9D #9D3D68 #989D3D #3D9D72

square

#423D9D #9D3D68 #989D3D #3D9D72

split-complementary

#423D9D #9D723D #689D3D

monochromatic

#1D1B45 #2F2C71 #423D9D #5E59BE #8985D0

Accessibility & contrast

On white

8.80

#423D9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#423D9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423D9D

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423D9D	#FFFFFF	#000000	##FFFFFF
##423D9D	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA0

Deuteranopia (green-blind)

#00479B

Tritanopia (blue-blind)

#0E5467

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #423d9d;
/* rgb */ color: rgb(66, 61, 157);
/* oklch */ color: oklch(42.3% 0.151 280.1);

Tailwind

colors: {
  custom: {
    50: '#7f73bb',
    500: '#423d9d',
    950: '#000000',
  },
}

SCSS

$custom: #423d9d;
$custom-light: #7f73bb;
$custom-dark: #000000;

JSON

{
  "hex": "#423d9d",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 157
  },
  "hsl": {
    "h": 243.125,
    "s": 44.037,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42332,
    "c": 0.15105,
    "h": 280.1
  },
  "luminance": 0.0693
}

Semantic roles & 50–950 ramp

primary

#423D9D

secondary

#B7BA7C

accent

#D454CD

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423D9D

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

Preview Lab → · Contrast checker → · Palette generator →