#423BB3#423BB3

#423BB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.9% C 0.183 H 278.3°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#423BB3
RGB	rgb(66, 59, 179)
HSL	hsl(244, 50%, 47%)
HSV	hsv(244, 67%, 70%)
CMYK	cmyk(63.1%, 67%, 0%, 29.8%)
CIE-LAB	lab(33.01, 39.22, -62.77)
CIE-LCH	lch(33.01, 74.01, 302.00°)
OKLab	oklab(43.89% 0.0265 -0.181)
OKLCH	oklch(43.89% 0.183 278.3)
XYZ	xyz(11.9448, 7.5399, 43.4650)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.49

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BB3 #ACB33B

analogous

#3B70B3 #423BB3 #7E3BB3

triadic

#423BB3 #B3423B #3BB342

tetradic

#423BB3 #B33B70 #ACB33B #3BB37E

square

#423BB3 #B33B70 #ACB33B #3BB37E

split-complementary

#423BB3 #B37E3B #70B33B

monochromatic

#201D57 #312C85 #423BB3 #6760CB #938EDA

Accessibility & contrast

On white

8.37

#423BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#423BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB3

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB3	#FFFFFF	#000000	##FFFFFF
##423BB3	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)

#0052B7

Deuteranopia (green-blind)

#0049B1

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423bb3;
/* rgb */ color: rgb(66, 59, 179);
/* oklch */ color: oklch(43.9% 0.183 278.3);

Tailwind

colors: {
  custom: {
    50: '#8472cb',
    500: '#423bb3',
    950: '#000000',
  },
}

SCSS

$custom: #423bb3;
$custom-light: #8472cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb3",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 179
  },
  "hsl": {
    "h": 243.5,
    "s": 50.42,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43893,
    "c": 0.18289,
    "h": 278.3
  },
  "luminance": 0.07541
}

Semantic roles & 50–950 ramp

primary

#423BB3

secondary

#C1C585

accent

#DA4ED2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423BB3

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

Preview Lab → · Contrast checker → · Palette generator →