#423BA5#423BA5

#423BA5 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.165 H 279.8°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#423BA5
RGB	rgb(66, 59, 165)
HSL	hsl(244, 47%, 44%)
HSV	hsv(244, 64%, 65%)
CMYK	cmyk(60%, 64.2%, 0%, 35.3%)
CIE-LAB	lab(31.81, 34.59, -56.35)
CIE-LCH	lch(31.81, 66.12, 301.54°)
OKLab	oklab(42.66% 0.0279 -0.1621)
OKLCH	oklch(42.66% 0.165 279.8)
XYZ	xyz(10.6001, 7.0020, 36.3830)
Luminance	0.0700 (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

#423BA5 #9EA53B

analogous

#3B69A5 #423BA5 #773BA5

triadic

#423BA5 #A5423B #3BA542

tetradic

#423BA5 #A53B69 #9EA53B #3BA577

square

#423BA5 #A53B69 #9EA53B #3BA577

split-complementary

#423BA5 #A5773B #69A53B

monochromatic

#1E1B4B #302B78 #423BA5 #6059C4 #8C86D4

Accessibility & contrast

On white

8.75

#423BA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#423BA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BA5

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BA5	#FFFFFF	#000000	##FFFFFF
##423BA5	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0047A3

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #423ba5;
/* rgb */ color: rgb(66, 59, 165);
/* oklch */ color: oklch(42.7% 0.165 279.8);

Tailwind

colors: {
  custom: {
    50: '#8171c1',
    500: '#423ba5',
    950: '#000000',
  },
}

SCSS

$custom: #423ba5;
$custom-light: #8171c1;
$custom-dark: #000000;

JSON

{
  "hex": "#423ba5",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 165
  },
  "hsl": {
    "h": 243.962,
    "s": 47.321,
    "l": 43.922
  },
  "oklch": {
    "l": 0.42656,
    "c": 0.16452,
    "h": 279.8
  },
  "luminance": 0.07003
}

Semantic roles & 50–950 ramp

primary

#423BA5

secondary

#BABE7E

accent

#D751CE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #423BA5

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

Preview Lab → · Contrast checker → · Palette generator →