#423CB3#423CB3

#423CB3 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.1% C 0.182 H 278.1°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#423CB3
RGB	rgb(66, 60, 179)
HSL	hsl(243, 50%, 47%)
HSV	hsv(243, 66%, 70%)
CMYK	cmyk(63.1%, 66.5%, 0%, 29.8%)
CIE-LAB	lab(33.23, 38.61, -62.40)
CIE-LCH	lch(33.23, 73.38, 301.75°)
OKLab	oklab(44.06% 0.0257 -0.1799)
OKLCH	oklch(44.06% 0.182 278.1)
XYZ	xyz(11.9967, 7.6437, 43.4823)
Luminance	0.0765 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.33

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423CB3 #ADB33C

analogous

#3C72B3 #423CB3 #7E3CB3

triadic

#423CB3 #B3423C #3CB342

tetradic

#423CB3 #B33C72 #ADB33C #3CB37E

square

#423CB3 #B33C72 #ADB33C #3CB37E

split-complementary

#423CB3 #B37E3C #72B33C

monochromatic

#201D57 #312D85 #423CB3 #6762CA #9390DA

Accessibility & contrast

On white

8.30

#423CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#423CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CB3

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CB3	#FFFFFF	#000000	##FFFFFF
##423CB3	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0049B1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423cb3;
/* rgb */ color: rgb(66, 60, 179);
/* oklch */ color: oklch(44.1% 0.182 278.1);

Tailwind

colors: {
  custom: {
    50: '#8372cb',
    500: '#423cb3',
    950: '#000000',
  },
}

SCSS

$custom: #423cb3;
$custom-light: #8372cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423cb3",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 179
  },
  "hsl": {
    "h": 243.025,
    "s": 49.791,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44055,
    "c": 0.1817,
    "h": 278.1
  },
  "luminance": 0.07645
}

Semantic roles & 50–950 ramp

primary

#423CB3

secondary

#C1C586

accent

#D94ED2

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423CB3

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

Preview Lab → · Contrast checker → · Palette generator →