#42429B#42429B

#42429B is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.1% C 0.141 H 278.7°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#42429B
RGB	rgb(66, 66, 155)
HSL	hsl(240, 40%, 43%)
HSV	hsv(240, 57%, 61%)
CMYK	cmyk(57.4%, 57.4%, 0%, 39.2%)
CIE-LAB	lab(32.75, 26.79, -48.79)
CIE-LCH	lch(32.75, 55.66, 298.77°)
OKLab	oklab(43.1% 0.0213 -0.1399)
OKLCH	oklch(43.1% 0.141 278.7)
XYZ	xyz(10.1095, 7.4206, 31.9036)
Luminance	0.0742 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42429B #9B9B42

analogous

#426E9B #42429B #6E429B

triadic

#42429B #9B4242 #429B42

tetradic

#42429B #9B426E #9B9B42 #429B6E

square

#42429B #9B426E #9B9B42 #429B6E

split-complementary

#42429B #9B6E42 #6E9B42

monochromatic

#1D1D45 #303070 #42429B #5F5FBB #8A8ACD

Accessibility & contrast

On white

8.45

#42429B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#42429B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42429B

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42429B	#FFFFFF	#000000	##FFFFFF
##42429B	1.00	8.45	2.48	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00519E

Deuteranopia (green-blind)

#004999

Tritanopia (blue-blind)

#115768

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #42429b;
/* rgb */ color: rgb(66, 66, 155);
/* oklch */ color: oklch(43.1% 0.141 278.7);

Tailwind

colors: {
  custom: {
    50: '#7f76b9',
    500: '#42429b',
    950: '#000000',
  },
}

SCSS

$custom: #42429b;
$custom-light: #7f76b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42429b",
  "rgb": {
    "r": 66,
    "g": 66,
    "b": 155
  },
  "hsl": {
    "h": 240,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.43098,
    "c": 0.14149,
    "h": 278.7
  },
  "luminance": 0.07421
}

Semantic roles & 50–950 ramp

primary

#42429B

secondary

#B8B881

accent

#D058D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0811

muted

#7C7B80

Preview Lab

Preview with #42429B

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

Preview Lab → · Contrast checker → · Palette generator →