#42478D#42478D

#42478D is a dark, moderate blue. Relative luminance 0.076; OKLCH L 43.1% C 0.114 H 277.4°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#42478D
RGB	rgb(66, 71, 141)
HSL	hsl(236, 36%, 41%)
HSV	hsv(236, 53%, 55%)
CMYK	cmyk(53.2%, 49.6%, 0%, 44.7%)
CIE-LAB	lab(33.11, 18.78, -39.68)
CIE-LCH	lch(33.11, 43.90, 295.33°)
OKLab	oklab(43.06% 0.0147 -0.113)
OKLCH	oklch(43.06% 0.114 277.4)
XYZ	xyz(9.3062, 7.5872, 26.1682)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42478D #8D8842

analogous

#426C8D #42478D #62428D

triadic

#42478D #8D4247 #478D42

tetradic

#42478D #8D426C #8D8842 #428D62

square

#42478D #8D426C #8D8842 #428D62

split-complementary

#42478D #8D6242 #6C8D42

monochromatic

#1B1D3A #2E3263 #42478D #5A60B2 #8488C5

Accessibility & contrast

On white

8.34

#42478D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#42478D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42478D

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42478D	#FFFFFF	#000000	##FFFFFF
##42478D	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275190

Deuteranopia (green-blind)

#1F4B8B

Tritanopia (blue-blind)

#225663

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #42478d;
/* rgb */ color: rgb(66, 71, 141);
/* oklch */ color: oklch(43.1% 0.114 277.4);

Tailwind

colors: {
  custom: {
    50: '#7c7aaf',
    500: '#42478d',
    950: '#000000',
  },
}

SCSS

$custom: #42478d;
$custom-light: #7c7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#42478d",
  "rgb": {
    "r": 66,
    "g": 71,
    "b": 141
  },
  "hsl": {
    "h": 236,
    "s": 36.232,
    "l": 40.588
  },
  "oklch": {
    "l": 0.43061,
    "c": 0.11396,
    "h": 277.4
  },
  "luminance": 0.07588
}

Semantic roles & 50–950 ramp

primary

#42478D

secondary

#B0AD7B

accent

#C55CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #42478D

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

Preview Lab → · Contrast checker → · Palette generator →