#3F71D3#3F71D3

#3F71D3 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.5% C 0.161 H 262.2°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F71D3
RGB	rgb(63, 113, 211)
HSL	hsl(220, 63%, 54%)
HSV	hsv(220, 70%, 83%)
CMYK	cmyk(70.1%, 46.4%, 0%, 17.3%)
CIE-LAB	lab(48.97, 15.91, -55.49)
CIE-LCH	lch(48.97, 57.73, 286.00°)
OKLab	oklab(56.54% -0.0218 -0.159)
OKLCH	oklch(56.54% 0.161 262.2)
XYZ	xyz(19.7087, 17.5681, 63.9677)
Luminance	0.1757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71D3 #D3A13F

analogous

#3FBBD3 #3F71D3 #573FD3

triadic

#3F71D3 #D33F71 #71D33F

tetradic

#3F71D3 #D33FBB #D3A13F #3FD357

square

#3F71D3 #D33FBB #D3A13F #3FD357

split-complementary

#3F71D3 #D3573F #BBD33F

monochromatic

#1C3C7B #2855AD #3F71D3 #7196DE #A3BBEA

Accessibility & contrast

On white

4.65

#3F71D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3F71D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71D3

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71D3	#FFFFFF	#000000	##FFFFFF
##3F71D3	1.00	4.65	4.51	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7CD7

Deuteranopia (green-blind)

#1C6ED1

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f71d3;
/* rgb */ color: rgb(63, 113, 211);
/* oklch */ color: oklch(56.5% 0.161 262.2);

Tailwind

colors: {
  custom: {
    50: '#8599e1',
    500: '#3f71d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f71d3;
$custom-light: #8599e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71d3",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 211
  },
  "hsl": {
    "h": 219.73,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.56535,
    "c": 0.1605,
    "h": 262.2
  },
  "luminance": 0.1757
}

Semantic roles & 50–950 ramp

primary

#3F71D3

secondary

#D7C197

accent

#AE42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71D3

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

Preview Lab → · Contrast checker → · Palette generator →