#42379A#42379A

#42379A is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.0% C 0.155 H 282.2°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#42379A
RGB	rgb(66, 55, 154)
HSL	hsl(247, 47%, 41%)
HSV	hsv(247, 64%, 60%)
CMYK	cmyk(57.1%, 64.3%, 0%, 39.6%)
CIE-LAB	lab(29.97, 33.44, -52.70)
CIE-LCH	lch(29.97, 62.41, 302.40°)
OKLab	oklab(41.03% 0.0327 -0.1514)
OKLCH	oklch(41.03% 0.155 282.2)
XYZ	xyz(9.4439, 6.2231, 31.2691)
Luminance	0.0622 (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

#42379A #8F9A37

analogous

#375D9A #42379A #73379A

triadic

#42379A #9A4237 #379A42

tetradic

#42379A #9A375D #8F9A37 #379A73

square

#42379A #9A375D #8F9A37 #379A73

split-complementary

#42379A #9A7337 #5D9A37

monochromatic

#1B1740 #2F276D #42379A #5B4EC0 #857BD0

Accessibility & contrast

On white

9.35

#42379A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#42379A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42379A

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42379A	#FFFFFF	#000000	##FFFFFF
##42379A	1.00	9.35	2.24	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9D

Deuteranopia (green-blind)

#004398

Tritanopia (blue-blind)

#154F63

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #42379a;
/* rgb */ color: rgb(66, 55, 154);
/* oklch */ color: oklch(41.0% 0.155 282.2);

Tailwind

colors: {
  custom: {
    50: '#7f6eb9',
    500: '#42379a',
    950: '#000000',
  },
}

SCSS

$custom: #42379a;
$custom-light: #7f6eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#42379a",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 154
  },
  "hsl": {
    "h": 246.667,
    "s": 47.368,
    "l": 40.98
  },
  "oklch": {
    "l": 0.41029,
    "c": 0.15488,
    "h": 282.2
  },
  "luminance": 0.06224
}

Semantic roles & 50–950 ramp

primary

#42379A

secondary

#B1B974

accent

#D751C8

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0711

muted

#7C7A80

Preview Lab

Preview with #42379A

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

Preview Lab → · Contrast checker → · Palette generator →