#3F478D#3F478D

#3F478D is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.8% C 0.115 H 275.5°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F478D
RGB	rgb(63, 71, 141)
HSL	hsl(234, 38%, 40%)
HSV	hsv(234, 55%, 55%)
CMYK	cmyk(55.3%, 49.6%, 0%, 44.7%)
CIE-LAB	lab(32.89, 18.09, -40.04)
CIE-LCH	lch(32.89, 43.94, 294.31°)
OKLab	oklab(42.84% 0.0111 -0.1142)
OKLCH	oklch(42.84% 0.115 275.5)
XYZ	xyz(9.1093, 7.4857, 26.1590)
Luminance	0.0749 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F478D #8D853F

analogous

#3F6E8D #3F478D #5E3F8D

triadic

#3F478D #8D3F47 #478D3F

tetradic

#3F478D #8D3F6E #8D853F #3F8D5E

square

#3F478D #8D3F6E #8D853F #3F8D5E

split-complementary

#3F478D #8D5E3F #6E8D3F

monochromatic

#191C38 #2C3263 #3F478D #565FB3 #8087C6

Accessibility & contrast

On white

8.41

#3F478D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#3F478D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F478D

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F478D	#FFFFFF	#000000	##FFFFFF
##3F478D	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265190

Deuteranopia (green-blind)

#1C4A8B

Tritanopia (blue-blind)

#195663

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f478d;
/* rgb */ color: rgb(63, 71, 141);
/* oklch */ color: oklch(42.8% 0.115 275.5);

Tailwind

colors: {
  custom: {
    50: '#7a7aaf',
    500: '#3f478d',
    950: '#000000',
  },
}

SCSS

$custom: #3f478d;
$custom-light: #7a7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f478d",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 141
  },
  "hsl": {
    "h": 233.846,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.42838,
    "c": 0.1147,
    "h": 275.5
  },
  "luminance": 0.07486
}

Semantic roles & 50–950 ramp

primary

#3F478D

secondary

#B1AB77

accent

#C25ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F478D

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

Preview Lab → · Contrast checker → · Palette generator →