#42378E#42378E

#42378E is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.0% C 0.138 H 284.0°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#42378E
RGB	rgb(66, 55, 142)
HSL	hsl(248, 44%, 39%)
HSV	hsv(248, 61%, 56%)
CMYK	cmyk(53.5%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(29.01, 29.52, -46.89)
CIE-LCH	lch(29.01, 55.41, 302.19°)
OKLab	oklab(40.03% 0.0334 -0.1343)
OKLCH	oklch(40.03% 0.138 284)
XYZ	xyz(8.4940, 5.8432, 26.2662)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42378E #838E37

analogous

#37578E #42378E #6D378E

triadic

#42378E #8E4237 #378E42

tetradic

#42378E #8E3757 #838E37 #378E6D

square

#42378E #8E3757 #838E37 #378E6D

split-complementary

#42378E #8E6D37 #578E37

monochromatic

#191536 #2D2662 #42378E #5849B9 #8076CA

Accessibility & contrast

On white

9.68

#42378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#42378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42378E

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42378E	#FFFFFF	#000000	##FFFFFF
##42378E	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#00428C

Tritanopia (blue-blind)

#234B5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #42378e;
/* rgb */ color: rgb(66, 55, 142);
/* oklch */ color: oklch(40.0% 0.138 284.0);

Tailwind

colors: {
  custom: {
    50: '#7d6eb0',
    500: '#42378e',
    950: '#000000',
  },
}

SCSS

$custom: #42378e;
$custom-light: #7d6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#42378e",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 247.586,
    "s": 44.162,
    "l": 38.627
  },
  "oklch": {
    "l": 0.4003,
    "c": 0.13843,
    "h": 284
  },
  "luminance": 0.05844
}

Semantic roles & 50–950 ramp

primary

#42378E

secondary

#AAB36E

accent

#D454C4

background

#F8F6FA

surface

#EFECF5

border

#CAC7CF

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #42378E

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

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