#42399D#42399D

#42399D is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.6% C 0.156 H 281.2°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#42399D
RGB	rgb(66, 57, 157)
HSL	hsl(245, 47%, 42%)
HSV	hsv(245, 64%, 62%)
CMYK	cmyk(58%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(30.68, 33.19, -53.35)
CIE-LCH	lch(30.68, 62.83, 301.88°)
OKLab	oklab(41.63% 0.0305 -0.1533)
OKLCH	oklch(41.63% 0.156 281.2)
XYZ	xyz(9.7938, 6.5182, 32.6338)
Luminance	0.0652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42399D #949D39

analogous

#39629D #42399D #74399D

triadic

#42399D #9D4239 #399D42

tetradic

#42399D #9D3962 #949D39 #399D74

square

#42399D #9D3962 #949D39 #399D74

split-complementary

#42399D #9D7439 #629D39

monochromatic

#1C1843 #2F2970 #42399D #5D53C0 #8780D1

Accessibility & contrast

On white

9.12

#42399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#42399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42399D

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42399D	#FFFFFF	#000000	##FFFFFF
##42399D	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA0

Deuteranopia (green-blind)

#00459B

Tritanopia (blue-blind)

#105265

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #42399d;
/* rgb */ color: rgb(66, 57, 157);
/* oklch */ color: oklch(41.6% 0.156 281.2);

Tailwind

colors: {
  custom: {
    50: '#8070bb',
    500: '#42399d',
    950: '#000000',
  },
}

SCSS

$custom: #42399d;
$custom-light: #8070bb;
$custom-dark: #000000;

JSON

{
  "hex": "#42399d",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 245.4,
    "s": 46.729,
    "l": 41.961
  },
  "oklch": {
    "l": 0.41627,
    "c": 0.15632,
    "h": 281.2
  },
  "luminance": 0.06519
}

Semantic roles & 50–950 ramp

primary

#42399D

secondary

#B4BA78

accent

#D651CA

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42399D

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

Preview Lab → · Contrast checker → · Palette generator →