#3F71D9#3F71D9

#3F71D9 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.9% C 0.169 H 262.9°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F71D9
RGB	rgb(63, 113, 217)
HSL	hsl(221, 67%, 55%)
HSV	hsv(221, 71%, 85%)
CMYK	cmyk(71%, 47.9%, 0%, 14.9%)
CIE-LAB	lab(49.34, 18.08, -58.30)
CIE-LCH	lch(49.34, 61.03, 287.23°)
OKLab	oklab(56.94% -0.0209 -0.1673)
OKLCH	oklch(56.94% 0.169 262.9)
XYZ	xyz(20.4750, 17.8746, 68.0033)
Luminance	0.1788 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71D9 #D9A73F

analogous

#3FBED9 #3F71D9 #5A3FD9

triadic

#3F71D9 #D93F71 #71D93F

tetradic

#3F71D9 #D93FBE #D9A73F #3FD95A

square

#3F71D9 #D93FBE #D9A73F #3FD95A

split-complementary

#3F71D9 #D95A3F #BED93F

monochromatic

#1A3C84 #2454B7 #3F71D9 #7297E3 #A5BDED

Accessibility & contrast

On white

4.59

#3F71D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#3F71D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71D9

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71D9	#FFFFFF	#000000	##FFFFFF
##3F71D9	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#387DDD

Deuteranopia (green-blind)

#076FD7

Tritanopia (blue-blind)

#008A9A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f71d9;
/* rgb */ color: rgb(63, 113, 217);
/* oklch */ color: oklch(56.9% 0.169 262.9);

Tailwind

colors: {
  custom: {
    50: '#8699e5',
    500: '#3f71d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f71d9;
$custom-light: #8699e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71d9",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 217
  },
  "hsl": {
    "h": 220.519,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.56943,
    "c": 0.16856,
    "h": 262.9
  },
  "luminance": 0.17877
}

Semantic roles & 50–950 ramp

primary

#3F71D9

secondary

#DAC59A

accent

#B23EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F71D9

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

Preview Lab → · Contrast checker → · Palette generator →