#3F478C#3F478C

#3F478C is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.8% C 0.113 H 275.6°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#3F478C
RGB	rgb(63, 71, 140)
HSL	hsl(234, 38%, 40%)
HSV	hsv(234, 55%, 55%)
CMYK	cmyk(55%, 49.3%, 0%, 45.1%)
CIE-LAB	lab(32.82, 17.75, -39.53)
CIE-LCH	lch(32.82, 43.33, 294.18°)
OKLab	oklab(42.77% 0.011 -0.1127)
OKLCH	oklch(42.77% 0.113 275.6)
XYZ	xyz(9.0353, 7.4561, 25.7689)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F478C #8C843F

analogous

#3F6E8C #3F478C #5D3F8C

triadic

#3F478C #8C3F47 #478C3F

tetradic

#3F478C #8C3F6E #8C843F #3F8C5D

square

#3F478C #8C3F6E #8C843F #3F8C5D

split-complementary

#3F478C #8C5D3F #6E8C3F

monochromatic

#191C38 #2C3262 #3F478C #555FB3 #8087C6

Accessibility & contrast

On white

8.43

#3F478C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3F478C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F478C

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F478C	#FFFFFF	#000000	##FFFFFF
##3F478C	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27518F

Deuteranopia (green-blind)

#1E4A8B

Tritanopia (blue-blind)

#1B5663

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f478c;
/* rgb */ color: rgb(63, 71, 140);
/* oklch */ color: oklch(42.8% 0.113 275.6);

Tailwind

colors: {
  custom: {
    50: '#7a7aae',
    500: '#3f478c',
    950: '#000000',
  },
}

SCSS

$custom: #3f478c;
$custom-light: #7a7aae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f478c",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 140
  },
  "hsl": {
    "h": 233.766,
    "s": 37.931,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42768,
    "c": 0.11319,
    "h": 275.6
  },
  "luminance": 0.07457
}

Semantic roles & 50–950 ramp

primary

#3F478C

secondary

#B0AA77

accent

#C25ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F478C

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

Preview Lab → · Contrast checker → · Palette generator →