#423F7B#423F7B

#423F7B is a dark, moderate blue. Relative luminance 0.061; OKLCH L 40.2% C 0.099 H 283.3°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#423F7B
RGB	rgb(66, 63, 123)
HSL	hsl(243, 32%, 36%)
HSV	hsv(243, 49%, 48%)
CMYK	cmyk(46.3%, 48.8%, 0%, 51.8%)
CIE-LAB	lab(29.77, 18.11, -33.86)
CIE-LCH	lch(29.77, 38.40, 298.14°)
OKLab	oklab(40.17% 0.0227 -0.096)
OKLCH	oklch(40.17% 0.099 283.3)
XYZ	xyz(7.5984, 6.1430, 19.5204)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423F7B #787B3F

analogous

#3F5A7B #423F7B #603F7B

triadic

#423F7B #7B423F #3F7B42

tetradic

#423F7B #7B3F5A #787B3F #3F7B60

square

#423F7B #7B3F5A #787B3F #3F7B60

split-complementary

#423F7B #7B603F #5A7B3F

monochromatic

#17162A #2C2A53 #423F7B #5854A3 #7D7ABB

Accessibility & contrast

On white

9.42

#423F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#423F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423F7B

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423F7B	#FFFFFF	#000000	##FFFFFF
##423F7B	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27487D

Deuteranopia (green-blind)

#24447A

Tritanopia (blue-blind)

#304B57

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #423f7b;
/* rgb */ color: rgb(66, 63, 123);
/* oklch */ color: oklch(40.2% 0.099 283.3);

Tailwind

colors: {
  custom: {
    50: '#7a74a1',
    500: '#423f7b',
    950: '#000000',
  },
}

SCSS

$custom: #423f7b;
$custom-light: #7a74a1;
$custom-dark: #000000;

JSON

{
  "hex": "#423f7b",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 123
  },
  "hsl": {
    "h": 243,
    "s": 32.258,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40171,
    "c": 0.09863,
    "h": 283.3
  },
  "luminance": 0.06143
}

Semantic roles & 50–950 ramp

primary

#423F7B

secondary

#A2A571

accent

#C85FC3

background

#F7F7FA

surface

#EEEDF3

border

#C9C8CD

text

#09080F

muted

#7B7B7F

Preview Lab

Preview with #423F7B

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

Preview Lab → · Contrast checker → · Palette generator →