#3F478F#3F478F

#3F478F is a dark, moderate blue. Relative luminance 0.075; OKLCH L 43.0% C 0.118 H 275.5°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F478F
RGB	rgb(63, 71, 143)
HSL	hsl(234, 39%, 40%)
HSV	hsv(234, 56%, 56%)
CMYK	cmyk(55.9%, 50.3%, 0%, 43.9%)
CIE-LAB	lab(33.02, 18.78, -41.06)
CIE-LCH	lch(33.02, 45.15, 294.58°)
OKLab	oklab(42.98% 0.0113 -0.1171)
OKLCH	oklch(42.98% 0.118 275.5)
XYZ	xyz(9.2595, 7.5458, 26.9498)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F478F #8F873F

analogous

#3F6F8F #3F478F #5F3F8F

triadic

#3F478F #8F3F47 #478F3F

tetradic

#3F478F #8F3F6F #8F873F #3F8F5F

square

#3F478F #8F3F6F #8F873F #3F8F5F

split-complementary

#3F478F #8F5F3F #6F8F3F

monochromatic

#1A1D3A #2C3265 #3F478F #5660B5 #8188C7

Accessibility & contrast

On white

8.37

#3F478F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F478F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F478F

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F478F	#FFFFFF	#000000	##FFFFFF
##3F478F	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#245192

Deuteranopia (green-blind)

#194A8D

Tritanopia (blue-blind)

#175764

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f478f;
/* rgb */ color: rgb(63, 71, 143);
/* oklch */ color: oklch(43.0% 0.118 275.5);

Tailwind

colors: {
  custom: {
    50: '#7b7ab0',
    500: '#3f478f',
    950: '#000000',
  },
}

SCSS

$custom: #3f478f;
$custom-light: #7b7ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f478f",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 143
  },
  "hsl": {
    "h": 234,
    "s": 38.835,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42979,
    "c": 0.1177,
    "h": 275.5
  },
  "luminance": 0.07546
}

Semantic roles & 50–950 ramp

primary

#3F478F

secondary

#B2AC78

accent

#C359CF

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F478F

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

Preview Lab → · Contrast checker → · Palette generator →