#42399F#42399F

#42399F is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.159 H 281.0°. Best body text is #FFFFFF at 9.06:1 contrast (WCAG AA passes).

Color values

HEX	#42399F
RGB	rgb(66, 57, 159)
HSL	hsl(245, 47%, 42%)
HSV	hsv(245, 64%, 62%)
CMYK	cmyk(58.5%, 64.2%, 0%, 37.6%)
CIE-LAB	lab(30.85, 33.84, -54.30)
CIE-LCH	lch(30.85, 63.98, 301.93°)
OKLab	oklab(41.8% 0.0303 -0.1561)
OKLCH	oklch(41.8% 0.159 281)
XYZ	xyz(9.9659, 6.5870, 33.5404)
Luminance	0.0659 (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

#42399F #969F39

analogous

#39639F #42399F #75399F

triadic

#42399F #9F4239 #399F42

tetradic

#42399F #9F3963 #969F39 #399F75

square

#42399F #9F3963 #969F39 #399F75

split-complementary

#42399F #9F7539 #639F39

monochromatic

#1D1945 #2F2972 #42399F #5D54C2 #8881D2

Accessibility & contrast

On white

9.06

#42399F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#42399F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42399F

9.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42399F	#FFFFFF	#000000	##FFFFFF
##42399F	1.00	9.06	2.32	9.06
#FFFFFF	9.06	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#00459D

Tritanopia (blue-blind)

#0B5266

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #42399f;
/* rgb */ color: rgb(66, 57, 159);
/* oklch */ color: oklch(41.8% 0.159 281.0);

Tailwind

colors: {
  custom: {
    50: '#8070bc',
    500: '#42399f',
    950: '#000000',
  },
}

SCSS

$custom: #42399f;
$custom-light: #8070bc;
$custom-dark: #000000;

JSON

{
  "hex": "#42399f",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 159
  },
  "hsl": {
    "h": 245.294,
    "s": 47.222,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41798,
    "c": 0.15902,
    "h": 281
  },
  "luminance": 0.06588
}

Semantic roles & 50–950 ramp

primary

#42399F

secondary

#B5BB78

accent

#D751CB

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42399F

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

Preview Lab → · Contrast checker → · Palette generator →