#42478C#42478C

#42478C is a dark, moderate blue. Relative luminance 0.076; OKLCH L 43.0% C 0.112 H 277.4°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#42478C
RGB	rgb(66, 71, 140)
HSL	hsl(236, 36%, 40%)
HSV	hsv(236, 53%, 55%)
CMYK	cmyk(52.9%, 49.3%, 0%, 45.1%)
CIE-LAB	lab(33.04, 18.44, -39.17)
CIE-LCH	lch(33.04, 43.29, 295.21°)
OKLab	oklab(42.99% 0.0146 -0.1115)
OKLCH	oklch(42.99% 0.112 277.4)
XYZ	xyz(9.2321, 7.5576, 25.7781)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42478C #8C8742

analogous

#426C8C #42478C #62428C

triadic

#42478C #8C4247 #478C42

tetradic

#42478C #8C426C #8C8742 #428C62

square

#42478C #8C426C #8C8742 #428C62

split-complementary

#42478C #8C6242 #6C8C42

monochromatic

#1B1D39 #2E3262 #42478C #5A60B1 #8488C5

Accessibility & contrast

On white

8.36

#42478C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#42478C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42478C

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42478C	#FFFFFF	#000000	##FFFFFF
##42478C	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28518F

Deuteranopia (green-blind)

#204B8A

Tritanopia (blue-blind)

#235663

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #42478c;
/* rgb */ color: rgb(66, 71, 140);
/* oklch */ color: oklch(43.0% 0.112 277.4);

Tailwind

colors: {
  custom: {
    50: '#7c7aae',
    500: '#42478c',
    950: '#000000',
  },
}

SCSS

$custom: #42478c;
$custom-light: #7c7aae;
$custom-dark: #000000;

JSON

{
  "hex": "#42478c",
  "rgb": {
    "r": 66,
    "g": 71,
    "b": 140
  },
  "hsl": {
    "h": 235.946,
    "s": 35.922,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42992,
    "c": 0.11246,
    "h": 277.4
  },
  "luminance": 0.07558
}

Semantic roles & 50–950 ramp

primary

#42478C

secondary

#B0AC7A

accent

#C45CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #42478C

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

Preview Lab → · Contrast checker → · Palette generator →