#423BB4#423BB4

#423BB4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.0% C 0.184 H 278.2°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#423BB4
RGB	rgb(66, 59, 180)
HSL	hsl(243, 51%, 47%)
HSV	hsv(243, 67%, 71%)
CMYK	cmyk(63.3%, 67.2%, 0%, 29.4%)
CIE-LAB	lab(33.09, 39.55, -63.22)
CIE-LCH	lch(33.09, 74.57, 302.03°)
OKLab	oklab(43.98% 0.0263 -0.1823)
OKLCH	oklch(43.98% 0.184 278.2)
XYZ	xyz(12.0463, 7.5805, 43.9995)
Luminance	0.0758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.47

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BB4 #ADB43B

analogous

#3B71B4 #423BB4 #7F3BB4

triadic

#423BB4 #B4423B #3BB442

tetradic

#423BB4 #B43B71 #ADB43B #3BB47F

square

#423BB4 #B43B71 #ADB43B #3BB47F

split-complementary

#423BB4 #B47F3B #71B43B

monochromatic

#201D58 #312C86 #423BB4 #6761CB #938FDA

Accessibility & contrast

On white

8.35

#423BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#423BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB4

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB4	#FFFFFF	#000000	##FFFFFF
##423BB4	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)

#0053B8

Deuteranopia (green-blind)

#0049B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423bb4;
/* rgb */ color: rgb(66, 59, 180);
/* oklch */ color: oklch(44.0% 0.184 278.2);

Tailwind

colors: {
  custom: {
    50: '#8472cb',
    500: '#423bb4',
    950: '#000000',
  },
}

SCSS

$custom: #423bb4;
$custom-light: #8472cb;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb4",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 180
  },
  "hsl": {
    "h": 243.471,
    "s": 50.628,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43983,
    "c": 0.18417,
    "h": 278.2
  },
  "luminance": 0.07581
}

Semantic roles & 50–950 ramp

primary

#423BB4

secondary

#C1C586

accent

#DA4ED2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423BB4

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

Preview Lab → · Contrast checker → · Palette generator →