#423FA9#423FA9

#423FA9 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.165 H 278.4°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#423FA9
RGB	rgb(66, 63, 169)
HSL	hsl(242, 46%, 45%)
HSV	hsv(242, 63%, 66%)
CMYK	cmyk(60.9%, 62.7%, 0%, 33.7%)
CIE-LAB	lab(33.09, 33.43, -56.67)
CIE-LCH	lch(33.09, 65.80, 300.54°)
OKLab	oklab(43.69% 0.024 -0.1631)
OKLCH	oklch(43.69% 0.165 278.4)
XYZ	xyz(11.1834, 7.5770, 38.4016)
Luminance	0.0758 (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

#423FA9 #A6A93F

analogous

#3F71A9 #423FA9 #773FA9

triadic

#423FA9 #A9423F #3FA942

tetradic

#423FA9 #A93F71 #A6A93F #3FA977

square

#423FA9 #A93F71 #A6A93F #3FA977

split-complementary

#423FA9 #A9773F #71A93F

monochromatic

#1F1E50 #312E7C #423FA9 #6461C4 #908ED5

Accessibility & contrast

On white

8.35

#423FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#423FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FA9

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FA9	#FFFFFF	#000000	##FFFFFF
##423FA9	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AC

Deuteranopia (green-blind)

#0049A7

Tritanopia (blue-blind)

#00596E

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423fa9;
/* rgb */ color: rgb(66, 63, 169);
/* oklch */ color: oklch(43.7% 0.165 278.4);

Tailwind

colors: {
  custom: {
    50: '#8174c3',
    500: '#423fa9',
    950: '#000000',
  },
}

SCSS

$custom: #423fa9;
$custom-light: #8174c3;
$custom-dark: #000000;

JSON

{
  "hex": "#423fa9",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 241.698,
    "s": 45.69,
    "l": 45.49
  },
  "oklch": {
    "l": 0.4369,
    "c": 0.16481,
    "h": 278.4
  },
  "luminance": 0.07578
}

Semantic roles & 50–950 ramp

primary

#423FA9

secondary

#BEC084

accent

#D552D2

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #423FA9

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

Preview Lab → · Contrast checker → · Palette generator →