#3F47B4#3F47B4

#3F47B4 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.8% C 0.170 H 274.3°. Best body text is #FFFFFF at 7.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F47B4
RGB	rgb(63, 71, 180)
HSL	hsl(236, 48%, 48%)
HSV	hsv(236, 65%, 71%)
CMYK	cmyk(65%, 60.6%, 0%, 29.4%)
CIE-LAB	lab(35.71, 31.65, -58.96)
CIE-LCH	lch(35.71, 66.92, 298.23°)
OKLab	oklab(45.84% 0.0128 -0.1698)
OKLCH	oklch(45.84% 0.17 274.3)
XYZ	xyz(12.5386, 8.8574, 44.2201)
Luminance	0.0886 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F47B4 #B4AC3F

analogous

#3F82B4 #3F47B4 #713FB4

triadic

#3F47B4 #B43F47 #47B43F

tetradic

#3F47B4 #B43F82 #B4AC3F #3FB471

square

#3F47B4 #B43F82 #B4AC3F #3FB471

split-complementary

#3F47B4 #B4713F #82B43F

monochromatic

#1F2359 #2F3587 #3F47B4 #676DCA #9499DA

Accessibility & contrast

On white

7.58

#3F47B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3F47B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F47B4

7.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47B4	#FFFFFF	#000000	##FFFFFF
##3F47B4	1.00	7.58	2.77	7.58
#FFFFFF	7.58	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B8

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#006276

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f47b4;
/* rgb */ color: rgb(63, 71, 180);
/* oklch */ color: oklch(45.8% 0.170 274.3);

Tailwind

colors: {
  custom: {
    50: '#817acb',
    500: '#3f47b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f47b4;
$custom-light: #817acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47b4",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 180
  },
  "hsl": {
    "h": 235.897,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.45841,
    "c": 0.17027,
    "h": 274.3
  },
  "luminance": 0.08859
}

Semantic roles & 50–950 ramp

primary

#3F47B4

secondary

#C5C18A

accent

#CE50D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0913

muted

#7D7B82

Preview Lab

Preview with #3F47B4

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

Preview Lab → · Contrast checker → · Palette generator →