#3F47D1#3F47D1

#3F47D1 is a mid, highly saturated blue. Relative luminance 0.102; OKLCH L 48.4% C 0.208 H 273.0°. Best body text is #FFFFFF at 6.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F47D1
RGB	rgb(63, 71, 209)
HSL	hsl(237, 61%, 53%)
HSV	hsv(237, 70%, 82%)
CMYK	cmyk(69.9%, 66%, 0%, 18%)
CIE-LAB	lab(38.14, 41.62, -71.93)
CIE-LCH	lch(38.14, 83.10, 300.05°)
OKLab	oklab(48.37% 0.011 -0.2078)
OKLCH	oklch(48.37% 0.208 273)
XYZ	xyz(15.8079, 10.1652, 61.4382)
Luminance	0.1017 (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

#3F47D1 #D1C93F

analogous

#3F90D1 #3F47D1 #803FD1

triadic

#3F47D1 #D13F47 #47D13F

tetradic

#3F47D1 #D13F90 #D1C93F #3FD180

square

#3F47D1 #D13F90 #D1C93F #3FD180

split-complementary

#3F47D1 #D1803F #90D13F

monochromatic

#1D2279 #2930AA #3F47D1 #7076DD #A2A6E9

Accessibility & contrast

On white

6.92

#3F47D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#3F47D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F47D1

6.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47D1	#FFFFFF	#000000	##FFFFFF
##3F47D1	1.00	6.92	3.03	6.92
#FFFFFF	6.92	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061D5

Deuteranopia (green-blind)

#0053CE

Tritanopia (blue-blind)

#006C86

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f47d1;
/* rgb */ color: rgb(63, 71, 209);
/* oklch */ color: oklch(48.4% 0.208 273.0);

Tailwind

colors: {
  custom: {
    50: '#877be0',
    500: '#3f47d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f47d1;
$custom-light: #877be0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47d1",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 209
  },
  "hsl": {
    "h": 236.712,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.48373,
    "c": 0.20812,
    "h": 273
  },
  "luminance": 0.10167
}

Semantic roles & 50–950 ramp

primary

#3F47D1

secondary

#D5D297

accent

#DC43E4

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F47D1

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

Preview Lab → · Contrast checker → · Palette generator →