#423DBA#423DBA

#423DBA is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.8% C 0.190 H 277.3°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#423DBA
RGB	rgb(66, 61, 186)
HSL	hsl(242, 51%, 48%)
HSV	hsv(242, 67%, 73%)
CMYK	cmyk(64.5%, 67.2%, 0%, 27.1%)
CIE-LAB	lab(34.07, 40.32, -65.18)
CIE-LCH	lch(34.07, 76.64, 301.74°)
OKLab	oklab(44.85% 0.0241 -0.188)
OKLCH	oklch(44.85% 0.19 277.3)
XYZ	xyz(12.7756, 8.0399, 47.3235)
Luminance	0.0804 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.23

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DBA #B5BA3D

analogous

#3D76BA #423DBA #803DBA

triadic

#423DBA #BA423D #3DBA42

tetradic

#423DBA #BA3D76 #B5BA3D #3DBA80

square

#423DBA #BA3D76 #B5BA3D #3DBA80

split-complementary

#423DBA #BA803D #76BA3D

monochromatic

#211F5E #322E8C #423DBA #6B67CD #9895DC

Accessibility & contrast

On white

8.05

#423DBA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#423DBA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DBA

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DBA	#FFFFFF	#000000	##FFFFFF
##423DBA	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BE

Deuteranopia (green-blind)

#004BB8

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423dba;
/* rgb */ color: rgb(66, 61, 186);
/* oklch */ color: oklch(44.8% 0.190 277.3);

Tailwind

colors: {
  custom: {
    50: '#8573d0',
    500: '#423dba',
    950: '#000000',
  },
}

SCSS

$custom: #423dba;
$custom-light: #8573d0;
$custom-dark: #000000;

JSON

{
  "hex": "#423dba",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 186
  },
  "hsl": {
    "h": 242.4,
    "s": 50.607,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44849,
    "c": 0.18954,
    "h": 277.3
  },
  "luminance": 0.08041
}

Semantic roles & 50–950 ramp

primary

#423DBA

secondary

#C5C88B

accent

#DA4ED4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423DBA

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

Preview Lab → · Contrast checker → · Palette generator →