#423FB2#423FB2

#423FB2 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.5% C 0.177 H 277.6°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#423FB2
RGB	rgb(66, 63, 178)
HSL	hsl(242, 48%, 47%)
HSV	hsv(242, 65%, 70%)
CMYK	cmyk(62.9%, 64.6%, 0%, 30.2%)
CIE-LAB	lab(33.83, 36.45, -60.83)
CIE-LCH	lch(33.83, 70.91, 300.93°)
OKLab	oklab(44.47% 0.0233 -0.1752)
OKLCH	oklch(44.47% 0.177 277.6)
XYZ	xyz(12.0576, 7.9267, 43.0054)
Luminance	0.0793 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.05

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FB2 #AFB23F

analogous

#3F76B2 #423FB2 #7B3FB2

triadic

#423FB2 #B2423F #3FB242

tetradic

#423FB2 #B23F76 #AFB23F #3FB27B

square

#423FB2 #B23F76 #AFB23F #3FB27B

split-complementary

#423FB2 #B27B3F #76B23F

monochromatic

#201F58 #312F85 #423FB2 #6866C9 #9593D9

Accessibility & contrast

On white

8.12

#423FB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#423FB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FB2

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FB2	#FFFFFF	#000000	##FFFFFF
##423FB2	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B6

Deuteranopia (green-blind)

#004BB0

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423fb2;
/* rgb */ color: rgb(66, 63, 178);
/* oklch */ color: oklch(44.5% 0.177 277.6);

Tailwind

colors: {
  custom: {
    50: '#8374ca',
    500: '#423fb2',
    950: '#000000',
  },
}

SCSS

$custom: #423fb2;
$custom-light: #8374ca;
$custom-dark: #000000;

JSON

{
  "hex": "#423fb2",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 178
  },
  "hsl": {
    "h": 241.565,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44465,
    "c": 0.17679,
    "h": 277.6
  },
  "luminance": 0.07928
}

Semantic roles & 50–950 ramp

primary

#423FB2

secondary

#C2C489

accent

#D750D4

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423FB2

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

Preview Lab → · Contrast checker → · Palette generator →