#423DBB#423DBB

#423DBB is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.9% C 0.191 H 277.2°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#423DBB
RGB	rgb(66, 61, 187)
HSL	hsl(242, 51%, 49%)
HSV	hsv(242, 67%, 73%)
CMYK	cmyk(64.7%, 67.4%, 0%, 26.7%)
CIE-LAB	lab(34.15, 40.65, -65.62)
CIE-LCH	lch(34.15, 77.19, 301.78°)
OKLab	oklab(44.94% 0.0239 -0.1893)
OKLCH	oklch(44.94% 0.191 277.2)
XYZ	xyz(12.8822, 8.0825, 47.8853)
Luminance	0.0808 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.27

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DBB #B6BB3D

analogous

#3D77BB #423DBB #813DBB

triadic

#423DBB #BB423D #3DBB42

tetradic

#423DBB #BB3D77 #B6BB3D #3DBB81

square

#423DBB #BB3D77 #B6BB3D #3DBB81

split-complementary

#423DBB #BB813D #77BB3D

monochromatic

#211F5F #322E8D #423DBB #6C68CE #9996DD

Accessibility & contrast

On white

8.03

#423DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#423DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DBB

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DBB	#FFFFFF	#000000	##FFFFFF
##423DBB	1.00	8.03	2.62	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#005E77

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423dbb;
/* rgb */ color: rgb(66, 61, 187);
/* oklch */ color: oklch(44.9% 0.191 277.2);

Tailwind

colors: {
  custom: {
    50: '#8573d1',
    500: '#423dbb',
    950: '#000000',
  },
}

SCSS

$custom: #423dbb;
$custom-light: #8573d1;
$custom-dark: #000000;

JSON

{
  "hex": "#423dbb",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 187
  },
  "hsl": {
    "h": 242.381,
    "s": 50.806,
    "l": 48.627
  },
  "oklch": {
    "l": 0.4494,
    "c": 0.19082,
    "h": 277.2
  },
  "luminance": 0.08084
}

Semantic roles & 50–950 ramp

primary

#423DBB

secondary

#C6C88C

accent

#DA4ED5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423DBB

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

Preview Lab → · Contrast checker → · Palette generator →