#423DB5#423DB5

#423DB5 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.4% C 0.183 H 277.7°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#423DB5
RGB	rgb(66, 61, 181)
HSL	hsl(243, 50%, 47%)
HSV	hsv(243, 66%, 71%)
CMYK	cmyk(63.5%, 66.3%, 0%, 29%)
CIE-LAB	lab(33.63, 38.67, -62.94)
CIE-LCH	lch(33.63, 73.87, 301.57°)
OKLab	oklab(44.4% 0.0246 -0.1814)
OKLCH	oklch(44.4% 0.183 277.7)
XYZ	xyz(12.2533, 7.8310, 44.5729)
Luminance	0.0783 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.17

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423DB5 #B0B53D

analogous

#3D74B5 #423DB5 #7E3DB5

triadic

#423DB5 #B5423D #3DB542

tetradic

#423DB5 #B53D74 #B0B53D #3DB57E

square

#423DB5 #B53D74 #B0B53D #3DB57E

split-complementary

#423DB5 #B57E3D #74B53D

monochromatic

#211E59 #312E87 #423DB5 #6964CB #9592DA

Accessibility & contrast

On white

8.18

#423DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#423DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DB5

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DB5	#FFFFFF	#000000	##FFFFFF
##423DB5	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#004AB3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423db5;
/* rgb */ color: rgb(66, 61, 181);
/* oklch */ color: oklch(44.4% 0.183 277.7);

Tailwind

colors: {
  custom: {
    50: '#8473cc',
    500: '#423db5',
    950: '#000000',
  },
}

SCSS

$custom: #423db5;
$custom-light: #8473cc;
$custom-dark: #000000;

JSON

{
  "hex": "#423db5",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 181
  },
  "hsl": {
    "h": 242.5,
    "s": 49.587,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44397,
    "c": 0.18311,
    "h": 277.7
  },
  "luminance": 0.07832
}

Semantic roles & 50–950 ramp

primary

#423DB5

secondary

#C3C588

accent

#D94FD3

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423DB5

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

Preview Lab → · Contrast checker → · Palette generator →