#423AB5#423AB5

#423AB5 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.9% C 0.187 H 278.3°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#423AB5
RGB	rgb(66, 58, 181)
HSL	hsl(244, 51%, 47%)
HSV	hsv(244, 68%, 71%)
CMYK	cmyk(63.5%, 68%, 0%, 29%)
CIE-LAB	lab(32.96, 40.47, -64.03)
CIE-LCH	lch(32.96, 75.75, 302.30°)
OKLab	oklab(43.92% 0.027 -0.1846)
OKLCH	oklch(43.92% 0.187 278.3)
XYZ	xyz(12.0976, 7.5196, 44.5210)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.64

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423AB5 #ADB53A

analogous

#3A70B5 #423AB5 #7F3AB5

triadic

#423AB5 #B5423A #3AB542

tetradic

#423AB5 #B53A70 #ADB53A #3AB57F

square

#423AB5 #B53A70 #ADB53A #3AB57F

split-complementary

#423AB5 #B57F3A #70B53A

monochromatic

#201C58 #312B87 #423AB5 #6760CC #938EDB

Accessibility & contrast

On white

8.39

#423AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#423AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423AB5

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423AB5	#FFFFFF	#000000	##FFFFFF
##423AB5	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #423ab5;
/* rgb */ color: rgb(66, 58, 181);
/* oklch */ color: oklch(43.9% 0.187 278.3);

Tailwind

colors: {
  custom: {
    50: '#8471cc',
    500: '#423ab5',
    950: '#000000',
  },
}

SCSS

$custom: #423ab5;
$custom-light: #8471cc;
$custom-dark: #000000;

JSON

{
  "hex": "#423ab5",
  "rgb": {
    "r": 66,
    "g": 58,
    "b": 181
  },
  "hsl": {
    "h": 243.902,
    "s": 51.464,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43915,
    "c": 0.18661,
    "h": 278.3
  },
  "luminance": 0.07521
}

Semantic roles & 50–950 ramp

primary

#423AB5

secondary

#C1C685

accent

#DB4DD2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #423AB5

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

Preview Lab → · Contrast checker → · Palette generator →