#42428B#42428B

#42428B is a dark, moderate blue. Relative luminance 0.069; OKLCH L 41.9% C 0.118 H 280.0°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#42428B
RGB	rgb(66, 66, 139)
HSL	hsl(240, 36%, 40%)
HSV	hsv(240, 53%, 55%)
CMYK	cmyk(52.5%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(31.62, 21.40, -40.84)
CIE-LCH	lch(31.62, 46.10, 297.65°)
OKLab	oklab(41.9% 0.0206 -0.1165)
OKLCH	oklch(41.9% 0.118 280)
XYZ	xyz(8.8537, 6.9183, 25.2899)
Luminance	0.0692 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42428B #8B8B42

analogous

#42668B #42428B #66428B

triadic

#42428B #8B4242 #428B42

tetradic

#42428B #8B4266 #8B8B42 #428B66

square

#42428B #8B4266 #8B8B42 #428B66

split-complementary

#42428B #8B6642 #668B42

monochromatic

#1B1B38 #2E2E62 #42428B #5A5AB1 #8383C4

Accessibility & contrast

On white

8.81

#42428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#42428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42428B

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42428B	#FFFFFF	#000000	##FFFFFF
##42428B	1.00	8.81	2.38	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4D8E

Deuteranopia (green-blind)

#164889

Tritanopia (blue-blind)

#245260

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #42428b;
/* rgb */ color: rgb(66, 66, 139);
/* oklch */ color: oklch(41.9% 0.118 280.0);

Tailwind

colors: {
  custom: {
    50: '#7c76ad',
    500: '#42428b',
    950: '#000000',
  },
}

SCSS

$custom: #42428b;
$custom-light: #7c76ad;
$custom-dark: #000000;

JSON

{
  "hex": "#42428b",
  "rgb": {
    "r": 66,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 240,
    "s": 35.61,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41898,
    "c": 0.11826,
    "h": 280
  },
  "luminance": 0.06919
}

Semantic roles & 50–950 ramp

primary

#42428B

secondary

#AFAF7A

accent

#CC5CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #42428B

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

Preview Lab → · Contrast checker → · Palette generator →