#423BBB#423BBB

#423BBB is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.6% C 0.193 H 277.6°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#423BBB
RGB	rgb(66, 59, 187)
HSL	hsl(243, 52%, 48%)
HSV	hsv(243, 68%, 73%)
CMYK	cmyk(64.7%, 68.4%, 0%, 26.7%)
CIE-LAB	lab(33.72, 41.84, -66.34)
CIE-LCH	lch(33.72, 78.43, 302.24°)
OKLab	oklab(44.62% 0.0254 -0.1914)
OKLCH	oklch(44.62% 0.193 277.6)
XYZ	xyz(12.7775, 7.8730, 47.8504)
Luminance	0.0787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.56

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423BBB #B4BB3B

analogous

#3B74BB #423BBB #823BBB

triadic

#423BBB #BB423B #3BBB42

tetradic

#423BBB #BB3B74 #B4BB3B #3BBB82

square

#423BBB #BB3B74 #B4BB3B #3BBB82

split-complementary

#423BBB #BB823B #74BB3B

monochromatic

#211E5E #322C8C #423BBB #6B65CE #9793DD

Accessibility & contrast

On white

8.16

#423BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#423BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BBB

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423BBB	#FFFFFF	#000000	##FFFFFF
##423BBB	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #423bbb;
/* rgb */ color: rgb(66, 59, 187);
/* oklch */ color: oklch(44.6% 0.193 277.6);

Tailwind

colors: {
  custom: {
    50: '#8572d1',
    500: '#423bbb',
    950: '#000000',
  },
}

SCSS

$custom: #423bbb;
$custom-light: #8572d1;
$custom-dark: #000000;

JSON

{
  "hex": "#423bbb",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 187
  },
  "hsl": {
    "h": 243.281,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44624,
    "c": 0.19309,
    "h": 277.6
  },
  "luminance": 0.07874
}

Semantic roles & 50–950 ramp

primary

#423BBB

secondary

#C5C88A

accent

#DB4CD4

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #423BBB

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

Preview Lab → · Contrast checker → · Palette generator →