#423DAB#423DAB

#423DAB is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.5% C 0.170 H 278.7°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#423DAB
RGB	rgb(66, 61, 171)
HSL	hsl(243, 47%, 45%)
HSV	hsv(243, 64%, 67%)
CMYK	cmyk(61.4%, 64.3%, 0%, 32.9%)
CIE-LAB	lab(32.78, 35.35, -58.37)
CIE-LCH	lch(32.78, 68.24, 301.19°)
OKLab	oklab(43.52% 0.0256 -0.1681)
OKLCH	oklch(43.52% 0.17 278.7)
XYZ	xyz(11.2638, 7.4352, 39.3617)
Luminance	0.0744 (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

#423DAB #A6AB3D

analogous

#3D6FAB #423DAB #793DAB

triadic

#423DAB #AB423D #3DAB42

tetradic

#423DAB #AB3D6F #A6AB3D #3DAB79

square

#423DAB #AB3D6F #A6AB3D #3DAB79

split-complementary

#423DAB #AB793D #6FAB3D

monochromatic

#1F1D51 #312D7E #423DAB #645FC6 #908CD6

Accessibility & contrast

On white

8.44

#423DAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#423DAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423DAB

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423DAB	#FFFFFF	#000000	##FFFFFF
##423DAB	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AE

Deuteranopia (green-blind)

#0049A9

Tritanopia (blue-blind)

#00596E

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423dab;
/* rgb */ color: rgb(66, 61, 171);
/* oklch */ color: oklch(43.5% 0.170 278.7);

Tailwind

colors: {
  custom: {
    50: '#8273c5',
    500: '#423dab',
    950: '#000000',
  },
}

SCSS

$custom: #423dab;
$custom-light: #8273c5;
$custom-dark: #000000;

JSON

{
  "hex": "#423dab",
  "rgb": {
    "r": 66,
    "g": 61,
    "b": 171
  },
  "hsl": {
    "h": 242.727,
    "s": 47.414,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43515,
    "c": 0.17,
    "h": 278.7
  },
  "luminance": 0.07436
}

Semantic roles & 50–950 ramp

primary

#423DAB

secondary

#BEC183

accent

#D751D1

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423DAB

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

Preview Lab → · Contrast checker → · Palette generator →