#42428D#42428D

#42428D is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.0% C 0.121 H 279.8°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#42428D
RGB	rgb(66, 66, 141)
HSL	hsl(240, 36%, 41%)
HSV	hsv(240, 53%, 55%)
CMYK	cmyk(53.2%, 53.2%, 0%, 44.7%)
CIE-LAB	lab(31.75, 22.07, -41.85)
CIE-LCH	lch(31.75, 47.31, 297.80°)
OKLab	oklab(42.04% 0.0207 -0.1194)
OKLCH	oklch(42.04% 0.121 279.8)
XYZ	xyz(9.0012, 6.9772, 26.0666)
Luminance	0.0698 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42428D #8D8D42

analogous

#42678D #42428D #67428D

triadic

#42428D #8D4242 #428D42

tetradic

#42428D #8D4267 #8D8D42 #428D67

square

#42428D #8D4267 #8D8D42 #428D67

split-complementary

#42428D #8D6742 #678D42

monochromatic

#1B1B3A #2E2E63 #42428D #5A5AB2 #8484C5

Accessibility & contrast

On white

8.77

#42428D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#42428D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42428D

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42428D	#FFFFFF	#000000	##FFFFFF
##42428D	1.00	8.77	2.40	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4E90

Deuteranopia (green-blind)

#12488B

Tritanopia (blue-blind)

#235361

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #42428d;
/* rgb */ color: rgb(66, 66, 141);
/* oklch */ color: oklch(42.0% 0.121 279.8);

Tailwind

colors: {
  custom: {
    50: '#7c76af',
    500: '#42428d',
    950: '#000000',
  },
}

SCSS

$custom: #42428d;
$custom-light: #7c76af;
$custom-dark: #000000;

JSON

{
  "hex": "#42428d",
  "rgb": {
    "r": 66,
    "g": 66,
    "b": 141
  },
  "hsl": {
    "h": 240,
    "s": 36.232,
    "l": 40.588
  },
  "oklch": {
    "l": 0.42042,
    "c": 0.12122,
    "h": 279.8
  },
  "luminance": 0.06978
}

Semantic roles & 50–950 ramp

primary

#42428D

secondary

#B0B07B

accent

#CC5CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #42428D

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

Preview Lab → · Contrast checker → · Palette generator →