#42399A#42399A

#42399A is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.152 H 281.6°. Best body text is #FFFFFF at 9.20:1 contrast (WCAG AA passes).

Color values

HEX	#42399A
RGB	rgb(66, 57, 154)
HSL	hsl(246, 46%, 41%)
HSV	hsv(246, 63%, 60%)
CMYK	cmyk(57.1%, 63%, 0%, 39.6%)
CIE-LAB	lab(30.44, 32.20, -51.93)
CIE-LCH	lch(30.44, 61.10, 301.80°)
OKLab	oklab(41.37% 0.0307 -0.1491)
OKLCH	oklch(41.37% 0.152 281.6)
XYZ	xyz(9.5408, 6.4170, 31.3014)
Luminance	0.0642 (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

#42399A #919A39

analogous

#39619A #42399A #73399A

triadic

#42399A #9A4239 #399A42

tetradic

#42399A #9A3961 #919A39 #399A73

square

#42399A #9A3961 #919A39 #399A73

split-complementary

#42399A #9A7339 #619A39

monochromatic

#1C1841 #2F286D #42399A #5C51BF #867ECF

Accessibility & contrast

On white

9.20

#42399A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#42399A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42399A

9.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42399A	#FFFFFF	#000000	##FFFFFF
##42399A	1.00	9.20	2.28	9.20
#FFFFFF	9.20	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9D

Deuteranopia (green-blind)

#004498

Tritanopia (blue-blind)

#155164

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #42399a;
/* rgb */ color: rgb(66, 57, 154);
/* oklch */ color: oklch(41.4% 0.152 281.6);

Tailwind

colors: {
  custom: {
    50: '#7f70b9',
    500: '#42399a',
    950: '#000000',
  },
}

SCSS

$custom: #42399a;
$custom-light: #7f70b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42399a",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 154
  },
  "hsl": {
    "h": 245.567,
    "s": 45.972,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41374,
    "c": 0.15226,
    "h": 281.6
  },
  "luminance": 0.06418
}

Semantic roles & 50–950 ramp

primary

#42399A

secondary

#B3B976

accent

#D652C9

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0711

muted

#7C7A80

Preview Lab

Preview with #42399A

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

Preview Lab → · Contrast checker → · Palette generator →