#423BB1#423BB1

#423BB1 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.180 H 278.5°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#423BB1
RGB	rgb(66, 59, 177)
HSL	hsl(244, 50%, 46%)
HSV	hsv(244, 67%, 69%)
CMYK	cmyk(62.7%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(32.83, 38.56, -61.87)
CIE-LCH	lch(32.83, 72.90, 301.93°)
OKLab	oklab(43.71% 0.0267 -0.1783)
OKLCH	oklch(43.71% 0.18 278.5)
XYZ	xyz(11.7440, 7.4596, 42.4074)
Luminance	0.0746 (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

#423BB1 #AAB13B

analogous

#3B6FB1 #423BB1 #7D3BB1

triadic

#423BB1 #B1423B #3BB142

tetradic

#423BB1 #B13B6F #AAB13B #3BB17D

square

#423BB1 #B13B6F #AAB13B #3BB17D

split-complementary

#423BB1 #B17D3B #6FB13B

monochromatic

#201C55 #312C83 #423BB1 #665FCA #928DD9

Accessibility & contrast

On white

8.43

#423BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#423BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB1

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB1	#FFFFFF	#000000	##FFFFFF
##423BB1	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0048AF

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #423bb1;
/* rgb */ color: rgb(66, 59, 177);
/* oklch */ color: oklch(43.7% 0.180 278.5);

Tailwind

colors: {
  custom: {
    50: '#8372c9',
    500: '#423bb1',
    950: '#000000',
  },
}

SCSS

$custom: #423bb1;
$custom-light: #8372c9;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb1",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 243.559,
    "s": 50,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43713,
    "c": 0.1803,
    "h": 278.5
  },
  "luminance": 0.07461
}

Semantic roles & 50–950 ramp

primary

#423BB1

secondary

#C0C484

accent

#DA4ED1

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423BB1

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

Preview Lab → · Contrast checker → · Palette generator →