#42399E#42399E

#42399E is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.7% C 0.158 H 281.1°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#42399E
RGB	rgb(66, 57, 158)
HSL	hsl(245, 47%, 42%)
HSV	hsv(245, 64%, 62%)
CMYK	cmyk(58.2%, 63.9%, 0%, 38%)
CIE-LAB	lab(30.77, 33.51, -53.83)
CIE-LCH	lch(30.77, 63.41, 301.91°)
OKLab	oklab(41.71% 0.0304 -0.1547)
OKLCH	oklch(41.71% 0.158 281.1)
XYZ	xyz(9.8795, 6.5525, 33.0853)
Luminance	0.0655 (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

#42399E #959E39

analogous

#39629E #42399E #75399E

triadic

#42399E #9E4239 #399E42

tetradic

#42399E #9E3962 #959E39 #399E75

square

#42399E #9E3962 #959E39 #399E75

split-complementary

#42399E #9E7539 #629E39

monochromatic

#1C1944 #2F2971 #42399E #5D53C1 #8780D1

Accessibility & contrast

On white

9.09

#42399E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#42399E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42399E

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42399E	#FFFFFF	#000000	##FFFFFF
##42399E	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00459C

Tritanopia (blue-blind)

#0D5266

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #42399e;
/* rgb */ color: rgb(66, 57, 158);
/* oklch */ color: oklch(41.7% 0.158 281.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#42399e",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 158
  },
  "hsl": {
    "h": 245.347,
    "s": 46.977,
    "l": 42.157
  },
  "oklch": {
    "l": 0.41712,
    "c": 0.15767,
    "h": 281.1
  },
  "luminance": 0.06553
}

Semantic roles & 50–950 ramp

primary

#42399E

secondary

#B5BB78

accent

#D751CB

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42399E

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

Preview Lab → · Contrast checker → · Palette generator →