#3F71D8#3F71D8

#3F71D8 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.9% C 0.167 H 262.8°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F71D8
RGB	rgb(63, 113, 216)
HSL	hsl(220, 66%, 55%)
HSV	hsv(220, 71%, 85%)
CMYK	cmyk(70.8%, 47.7%, 0%, 15.3%)
CIE-LAB	lab(49.28, 17.72, -57.83)
CIE-LCH	lch(49.28, 60.48, 287.03°)
OKLab	oklab(56.87% -0.021 -0.1659)
OKLCH	oklch(56.87% 0.167 262.8)
XYZ	xyz(20.3453, 17.8227, 67.3203)
Luminance	0.1782 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71D8 #D8A63F

analogous

#3FBED8 #3F71D8 #593FD8

triadic

#3F71D8 #D83F71 #71D83F

tetradic

#3F71D8 #D83FBE #D8A63F #3FD859

square

#3F71D8 #D83FBE #D8A63F #3FD859

split-complementary

#3F71D8 #D8593F #BED83F

monochromatic

#1A3C82 #2554B5 #3F71D8 #7297E2 #A5BCED

Accessibility & contrast

On white

4.60

#3F71D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3F71D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71D8

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71D8	#FFFFFF	#000000	##FFFFFF
##3F71D8	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#397DDC

Deuteranopia (green-blind)

#0C6FD6

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f71d8;
/* rgb */ color: rgb(63, 113, 216);
/* oklch */ color: oklch(56.9% 0.167 262.8);

Tailwind

colors: {
  custom: {
    50: '#8699e5',
    500: '#3f71d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f71d8;
$custom-light: #8699e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71d8",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 216
  },
  "hsl": {
    "h": 220.392,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.56874,
    "c": 0.16723,
    "h": 262.8
  },
  "luminance": 0.17825
}

Semantic roles & 50–950 ramp

primary

#3F71D8

secondary

#DAC599

accent

#B13FE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F71D8

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

Preview Lab → · Contrast checker → · Palette generator →