#423BB5#423BB5

#423BB5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.1% C 0.185 H 278.1°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#423BB5
RGB	rgb(66, 59, 181)
HSL	hsl(243, 51%, 47%)
HSV	hsv(243, 67%, 71%)
CMYK	cmyk(63.5%, 67.4%, 0%, 29%)
CIE-LAB	lab(33.18, 39.87, -63.67)
CIE-LCH	lch(33.18, 75.12, 302.06°)
OKLab	oklab(44.07% 0.0262 -0.1836)
OKLCH	oklch(44.07% 0.185 278.1)
XYZ	xyz(12.1485, 7.6214, 44.5380)
Luminance	0.0762 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.46

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BB5 #AEB53B

analogous

#3B71B5 #423BB5 #7F3BB5

triadic

#423BB5 #B5423B #3BB542

tetradic

#423BB5 #B53B71 #AEB53B #3BB57F

square

#423BB5 #B53B71 #AEB53B #3BB57F

split-complementary

#423BB5 #B57F3B #71B53B

monochromatic

#201D59 #312C87 #423BB5 #6862CC #9490DB

Accessibility & contrast

On white

8.32

#423BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#423BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BB5

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BB5	#FFFFFF	#000000	##FFFFFF
##423BB5	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0049B3

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423bb5;
/* rgb */ color: rgb(66, 59, 181);
/* oklch */ color: oklch(44.1% 0.185 278.1);

Tailwind

colors: {
  custom: {
    50: '#8472cc',
    500: '#423bb5',
    950: '#000000',
  },
}

SCSS

$custom: #423bb5;
$custom-light: #8472cc;
$custom-dark: #000000;

JSON

{
  "hex": "#423bb5",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 181
  },
  "hsl": {
    "h": 243.443,
    "s": 50.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44074,
    "c": 0.18545,
    "h": 278.1
  },
  "luminance": 0.07622
}

Semantic roles & 50–950 ramp

primary

#423BB5

secondary

#C2C686

accent

#DA4DD2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423BB5

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

Preview Lab → · Contrast checker → · Palette generator →