#3F478E#3F478E

#3F478E is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.9% C 0.116 H 275.5°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F478E
RGB	rgb(63, 71, 142)
HSL	hsl(234, 39%, 40%)
HSV	hsv(234, 56%, 56%)
CMYK	cmyk(55.6%, 50%, 0%, 44.3%)
CIE-LAB	lab(32.95, 18.44, -40.55)
CIE-LCH	lch(32.95, 44.55, 294.45°)
OKLab	oklab(42.91% 0.0112 -0.1157)
OKLCH	oklch(42.91% 0.116 275.5)
XYZ	xyz(9.1841, 7.5156, 26.5526)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F478E #8E863F

analogous

#3F6E8E #3F478E #5E3F8E

triadic

#3F478E #8E3F47 #478E3F

tetradic

#3F478E #8E3F6E #8E863F #3F8E5E

square

#3F478E #8E3F6E #8E863F #3F8E5E

split-complementary

#3F478E #8E5E3F #6E8E3F

monochromatic

#191D39 #2C3264 #3F478E #5660B4 #8188C7

Accessibility & contrast

On white

8.39

#3F478E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#3F478E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F478E

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F478E	#FFFFFF	#000000	##FFFFFF
##3F478E	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#255191

Deuteranopia (green-blind)

#1B4A8C

Tritanopia (blue-blind)

#185763

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f478e;
/* rgb */ color: rgb(63, 71, 142);
/* oklch */ color: oklch(42.9% 0.116 275.5);

Tailwind

colors: {
  custom: {
    50: '#7a7aaf',
    500: '#3f478e',
    950: '#000000',
  },
}

SCSS

$custom: #3f478e;
$custom-light: #7a7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f478e",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 142
  },
  "hsl": {
    "h": 233.924,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.42908,
    "c": 0.1162,
    "h": 275.5
  },
  "luminance": 0.07516
}

Semantic roles & 50–950 ramp

primary

#3F478E

secondary

#B1AB78

accent

#C359CE

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F478E

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

Preview Lab → · Contrast checker → · Palette generator →