#423FBB#423FBB

#423FBB is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.3% C 0.189 H 276.8°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#423FBB
RGB	rgb(66, 63, 187)
HSL	hsl(241, 50%, 49%)
HSV	hsv(241, 66%, 73%)
CMYK	cmyk(64.7%, 66.3%, 0%, 26.7%)
CIE-LAB	lab(34.60, 39.45, -64.89)
CIE-LCH	lch(34.60, 75.94, 301.30°)
OKLab	oklab(45.26% 0.0224 -0.1872)
OKLCH	oklch(45.26% 0.189 276.8)
XYZ	xyz(12.9910, 8.3000, 47.9215)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423FBB #B8BB3F

analogous

#3F7ABB #423FBB #803FBB

triadic

#423FBB #BB423F #3FBB42

tetradic

#423FBB #BB3F7A #B8BB3F #3FBB80

square

#423FBB #BB3F7A #B8BB3F #3FBB80

split-complementary

#423FBB #BB803F #7ABB3F

monochromatic

#22205F #32308D #423FBB #6D6ACD #9A98DC

Accessibility & contrast

On white

7.89

#423FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#423FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423FBB

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423FBB	#FFFFFF	#000000	##FFFFFF
##423FBB	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #423fbb;
/* rgb */ color: rgb(66, 63, 187);
/* oklch */ color: oklch(45.3% 0.189 276.8);

Tailwind

colors: {
  custom: {
    50: '#8575d0',
    500: '#423fbb',
    950: '#000000',
  },
}

SCSS

$custom: #423fbb;
$custom-light: #8575d0;
$custom-dark: #000000;

JSON

{
  "hex": "#423fbb",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 187
  },
  "hsl": {
    "h": 241.452,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.45263,
    "c": 0.18851,
    "h": 276.8
  },
  "luminance": 0.08301
}

Semantic roles & 50–950 ramp

primary

#423FBB

secondary

#C7C88E

accent

#D94FD6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423FBB

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

Preview Lab → · Contrast checker → · Palette generator →