#42428F#42428F

#42428F is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.2% C 0.124 H 279.7°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#42428F
RGB	rgb(66, 66, 143)
HSL	hsl(240, 37%, 41%)
HSV	hsv(240, 54%, 56%)
CMYK	cmyk(53.8%, 53.8%, 0%, 43.9%)
CIE-LAB	lab(31.89, 22.74, -42.86)
CIE-LCH	lch(31.89, 48.52, 297.95°)
OKLab	oklab(42.19% 0.0209 -0.1224)
OKLCH	oklch(42.19% 0.124 279.7)
XYZ	xyz(9.1514, 7.0373, 26.8574)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42428F #8F8F42

analogous

#42688F #42428F #68428F

triadic

#42428F #8F4242 #428F42

tetradic

#42428F #8F4268 #8F8F42 #428F68

square

#42428F #8F4268 #8F8F42 #428F68

split-complementary

#42428F #8F6842 #688F42

monochromatic

#1B1B3B #2F2F65 #42428F #5B5BB3 #8585C7

Accessibility & contrast

On white

8.72

#42428F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#42428F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42428F

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42428F	#FFFFFF	#000000	##FFFFFF
##42428F	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184E92

Deuteranopia (green-blind)

#0E488D

Tritanopia (blue-blind)

#215362

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #42428f;
/* rgb */ color: rgb(66, 66, 143);
/* oklch */ color: oklch(42.2% 0.124 279.7);

Tailwind

colors: {
  custom: {
    50: '#7d76b0',
    500: '#42428f',
    950: '#000000',
  },
}

SCSS

$custom: #42428f;
$custom-light: #7d76b0;
$custom-dark: #000000;

JSON

{
  "hex": "#42428f",
  "rgb": {
    "r": 66,
    "g": 66,
    "b": 143
  },
  "hsl": {
    "h": 240,
    "s": 36.842,
    "l": 40.98
  },
  "oklch": {
    "l": 0.42189,
    "c": 0.12416,
    "h": 279.7
  },
  "luminance": 0.07038
}

Semantic roles & 50–950 ramp

primary

#42428F

secondary

#B1B17B

accent

#CD5BCD

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #42428F

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

Preview Lab → · Contrast checker → · Palette generator →