#423BC9#423BC9

#423BC9 is a mid, highly saturated blue. Relative luminance 0.085; OKLCH L 45.9% C 0.210 H 276.4°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#423BC9
RGB	rgb(66, 59, 201)
HSL	hsl(243, 57%, 51%)
HSV	hsv(243, 71%, 79%)
CMYK	cmyk(67.2%, 70.6%, 0%, 21.2%)
CIE-LAB	lab(35.01, 46.38, -72.42)
CIE-LCH	lch(35.01, 86.00, 302.64°)
OKLab	oklab(45.94% 0.0233 -0.2092)
OKLCH	oklch(45.94% 0.211 276.4)
XYZ	xyz(14.3499, 8.5020, 56.1318)
Luminance	0.0850 (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

#423BC9 #C2C93B

analogous

#3B7BC9 #423BC9 #893BC9

triadic

#423BC9 #C9423B #3BC942

tetradic

#423BC9 #C93B7B #C2C93B #3BC989

square

#423BC9 #C93B7B #C2C93B #3BC989

split-complementary

#423BC9 #C9893B #7BC93B

monochromatic

#221E6C #312B9C #423BC9 #706BD6 #9F9BE3

Accessibility & contrast

On white

7.78

#423BC9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#423BC9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BC9

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BC9	#FFFFFF	#000000	##FFFFFF
##423BC9	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058CD

Deuteranopia (green-blind)

#004CC6

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #423bc9;
/* rgb */ color: rgb(66, 59, 201);
/* oklch */ color: oklch(45.9% 0.210 276.4);

Tailwind

colors: {
  custom: {
    50: '#8872db',
    500: '#423bc9',
    950: '#000000',
  },
}

SCSS

$custom: #423bc9;
$custom-light: #8872db;
$custom-dark: #000000;

JSON

{
  "hex": "#423bc9",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 201
  },
  "hsl": {
    "h": 242.958,
    "s": 56.8,
    "l": 50.98
  },
  "oklch": {
    "l": 0.45943,
    "c": 0.2105,
    "h": 276.4
  },
  "luminance": 0.08503
}

Semantic roles & 50–950 ramp

primary

#423BC9

secondary

#CCCF90

accent

#E048D9

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #423BC9

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

Preview Lab → · Contrast checker → · Palette generator →