#423D8D#423D8D

#423D8D is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.128 H 281.9°. Best body text is #FFFFFF at 9.20:1 contrast (WCAG AA passes).

Color values

HEX	#423D8D
RGB	rgb(66, 61, 141)
HSL	hsl(244, 40%, 40%)
HSV	hsv(244, 57%, 55%)
CMYK	cmyk(53.2%, 56.7%, 0%, 44.7%)
CIE-LAB	lab(30.44, 25.33, -43.96)
CIE-LCH	lch(30.44, 50.74, 299.95°)
OKLab	oklab(41.06% 0.0266 -0.1257)
OKLCH	oklch(41.06% 0.128 281.9)
XYZ	xyz(8.7218, 6.4183, 25.9734)
Luminance	0.0642 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423D8D #888D3D

analogous

#3D608D #423D8D #6A3D8D

triadic

#423D8D #8D423D #3D8D42

tetradic

#423D8D #8D3D60 #888D3D #3D8D6A

square

#423D8D #8D3D60 #888D3D #3D8D6A

split-complementary

#423D8D #8D6A3D #608D3D

monochromatic

#1A1838 #2E2B62 #423D8D #5953B4 #827DC7

Accessibility & contrast

On white

9.20

#423D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#423D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423D8D

9.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423D8D	#FFFFFF	#000000	##FFFFFF
##423D8D	1.00	9.20	2.28	9.20
#FFFFFF	9.20	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#094A90

Deuteranopia (green-blind)

#00458B

Tritanopia (blue-blind)

#234F5F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #423d8d;
/* rgb */ color: rgb(66, 61, 141);
/* oklch */ color: oklch(41.1% 0.128 281.9);

Tailwind

colors: {
  custom: {
    50: '#7d72af',
    500: '#423d8d',
    950: '#000000',
  },
}

SCSS

$custom: #423d8d;
$custom-light: #7d72af;
$custom-dark: #000000;

JSON

{
  "hex": "#423d8d",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 141
  },
  "hsl": {
    "h": 243.75,
    "s": 39.604,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41064,
    "c": 0.12847,
    "h": 281.9
  },
  "luminance": 0.06419
}

Semantic roles & 50–950 ramp

primary

#423D8D

secondary

#ADB175

accent

#CF58C8

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #423D8D

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

Preview Lab → · Contrast checker → · Palette generator →