#3F71DF#3F71DF

#3F71DF is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.4% C 0.177 H 263.5°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F71DF
RGB	rgb(63, 113, 223)
HSL	hsl(221, 71%, 56%)
HSV	hsv(221, 72%, 87%)
CMYK	cmyk(71.7%, 49.3%, 0%, 12.5%)
CIE-LAB	lab(49.73, 20.25, -61.07)
CIE-LCH	lch(49.73, 64.34, 288.34°)
OKLab	oklab(57.36% -0.0201 -0.1754)
OKLCH	oklch(57.36% 0.177 263.5)
XYZ	xyz(21.2696, 18.1925, 72.1883)
Luminance	0.1820 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71DF #DFAD3F

analogous

#3FC1DF #3F71DF #5D3FDF

triadic

#3F71DF #DF3F71 #71DF3F

tetradic

#3F71DF #DF3FC1 #DFAD3F #3FDF5D

square

#3F71DF #DF3FC1 #DFAD3F #3FDF5D

split-complementary

#3F71DF #DF5D3F #C1DF3F

monochromatic

#173C8C #2052C1 #3F71DF #7398E8 #A8BFF0

Accessibility & contrast

On white

4.53

#3F71DF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#3F71DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F71DF

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71DF	#FFFFFF	#000000	##000000
##3F71DF	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#317EE3

Deuteranopia (green-blind)

#006FDD

Tritanopia (blue-blind)

#008B9D

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f71df;
/* rgb */ color: rgb(63, 113, 223);
/* oklch */ color: oklch(57.4% 0.177 263.5);

Tailwind

colors: {
  custom: {
    50: '#8899ea',
    500: '#3f71df',
    950: '#000000',
  },
}

SCSS

$custom: #3f71df;
$custom-light: #8899ea;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71df",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 223
  },
  "hsl": {
    "h": 221.25,
    "s": 71.429,
    "l": 56.078
  },
  "oklch": {
    "l": 0.57361,
    "c": 0.17658,
    "h": 263.5
  },
  "luminance": 0.18195
}

Semantic roles & 50–950 ramp

primary

#3F71DF

secondary

#DEC99C

accent

#B63AEE

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F71DF

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

Preview Lab → · Contrast checker → · Palette generator →