#42379B#42379B

#42379B is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.1% C 0.156 H 282.0°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#42379B
RGB	rgb(66, 55, 155)
HSL	hsl(247, 48%, 41%)
HSV	hsv(247, 65%, 61%)
CMYK	cmyk(57.4%, 64.5%, 0%, 39.2%)
CIE-LAB	lab(30.05, 33.77, -53.17)
CIE-LCH	lch(30.05, 62.99, 302.42°)
OKLab	oklab(41.11% 0.0326 -0.1528)
OKLCH	oklch(41.11% 0.156 282)
XYZ	xyz(9.5275, 6.2566, 31.7096)
Luminance	0.0626 (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

#42379B #909B37

analogous

#375E9B #42379B #74379B

triadic

#42379B #9B4237 #379B42

tetradic

#42379B #9B375E #909B37 #379B74

square

#42379B #9B375E #909B37 #379B74

split-complementary

#42379B #9B7437 #5E9B37

monochromatic

#1C1741 #2F276E #42379B #5B4FC0 #857CD0

Accessibility & contrast

On white

9.33

#42379B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#42379B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42379B

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42379B	#FFFFFF	#000000	##FFFFFF
##42379B	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#004399

Tritanopia (blue-blind)

#145064

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #42379b;
/* rgb */ color: rgb(66, 55, 155);
/* oklch */ color: oklch(41.1% 0.156 282.0);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#42379b",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 155
  },
  "hsl": {
    "h": 246.6,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.41114,
    "c": 0.15623,
    "h": 282
  },
  "luminance": 0.06257
}

Semantic roles & 50–950 ramp

primary

#42379B

secondary

#B2BA74

accent

#D751C8

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42379B

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

Preview Lab → · Contrast checker → · Palette generator →