#42399C#42399C

#42399C is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.155 H 281.4°. Best body text is #FFFFFF at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#42399C
RGB	rgb(66, 57, 156)
HSL	hsl(245, 46%, 42%)
HSV	hsv(245, 63%, 61%)
CMYK	cmyk(57.7%, 63.5%, 0%, 38.8%)
CIE-LAB	lab(30.60, 32.86, -52.88)
CIE-LCH	lch(30.60, 62.26, 301.85°)
OKLab	oklab(41.54% 0.0305 -0.1519)
OKLCH	oklch(41.54% 0.155 281.4)
XYZ	xyz(9.7088, 6.4842, 32.1860)
Luminance	0.0649 (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

#42399C #939C39

analogous

#39619C #42399C #74399C

triadic

#42399C #9C4239 #399C42

tetradic

#42399C #9C3961 #939C39 #399C74

square

#42399C #9C3961 #939C39 #399C74

split-complementary

#42399C #9C7439 #619C39

monochromatic

#1C1842 #2F296F #42399C #5C52C0 #877FD0

Accessibility & contrast

On white

9.14

#42399C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#42399C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42399C

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42399C	#FFFFFF	#000000	##FFFFFF
##42399C	1.00	9.14	2.30	9.14
#FFFFFF	9.14	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9F

Deuteranopia (green-blind)

#00449A

Tritanopia (blue-blind)

#125165

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #42399c;
/* rgb */ color: rgb(66, 57, 156);
/* oklch */ color: oklch(41.5% 0.155 281.4);

Tailwind

colors: {
  custom: {
    50: '#7f70ba',
    500: '#42399c',
    950: '#000000',
  },
}

SCSS

$custom: #42399c;
$custom-light: #7f70ba;
$custom-dark: #000000;

JSON

{
  "hex": "#42399c",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 156
  },
  "hsl": {
    "h": 245.455,
    "s": 46.479,
    "l": 41.765
  },
  "oklch": {
    "l": 0.41542,
    "c": 0.15498,
    "h": 281.4
  },
  "luminance": 0.06485
}

Semantic roles & 50–950 ramp

primary

#42399C

secondary

#B4BA77

accent

#D652CA

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42399C

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

Preview Lab → · Contrast checker → · Palette generator →