#423CBB#423CBB

#423CBB is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.8% C 0.192 H 277.4°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#423CBB
RGB	rgb(66, 60, 187)
HSL	hsl(243, 51%, 48%)
HSV	hsv(243, 68%, 73%)
CMYK	cmyk(64.7%, 67.9%, 0%, 26.7%)
CIE-LAB	lab(33.93, 41.25, -65.98)
CIE-LCH	lch(33.93, 77.81, 302.01°)
OKLab	oklab(44.78% 0.0247 -0.1904)
OKLCH	oklch(44.78% 0.192 277.4)
XYZ	xyz(12.8294, 7.9768, 47.8677)
Luminance	0.0798 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.40

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423CBB #B5BB3C

analogous

#3C75BB #423CBB #813CBB

triadic

#423CBB #BB423C #3CBB42

tetradic

#423CBB #BB3C75 #B5BB3C #3CBB81

square

#423CBB #BB3C75 #B5BB3C #3CBB81

split-complementary

#423CBB #BB813C #75BB3C

monochromatic

#211E5E #322D8D #423CBB #6B66CE #9895DD

Accessibility & contrast

On white

8.09

#423CBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#423CBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423CBB

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423CBB	#FFFFFF	#000000	##FFFFFF
##423CBB	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #423cbb;
/* rgb */ color: rgb(66, 60, 187);
/* oklch */ color: oklch(44.8% 0.192 277.4);

Tailwind

colors: {
  custom: {
    50: '#8573d1',
    500: '#423cbb',
    950: '#000000',
  },
}

SCSS

$custom: #423cbb;
$custom-light: #8573d1;
$custom-dark: #000000;

JSON

{
  "hex": "#423cbb",
  "rgb": {
    "r": 66,
    "g": 60,
    "b": 187
  },
  "hsl": {
    "h": 242.835,
    "s": 51.417,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44781,
    "c": 0.19196,
    "h": 277.4
  },
  "luminance": 0.07978
}

Semantic roles & 50–950 ramp

primary

#423CBB

secondary

#C5C88B

accent

#DB4DD4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423CBB

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

Preview Lab → · Contrast checker → · Palette generator →