#3F71D5#3F71D5

#3F71D5 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.7% C 0.163 H 262.4°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F71D5
RGB	rgb(63, 113, 213)
HSL	hsl(220, 64%, 54%)
HSV	hsv(220, 70%, 84%)
CMYK	cmyk(70.4%, 46.9%, 0%, 16.5%)
CIE-LAB	lab(49.09, 16.63, -56.43)
CIE-LCH	lch(49.09, 58.83, 286.42°)
OKLab	oklab(56.67% -0.0215 -0.1618)
OKLCH	oklch(56.67% 0.163 262.4)
XYZ	xyz(19.9610, 17.6690, 65.2964)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71D5 #D5A33F

analogous

#3FBCD5 #3F71D5 #583FD5

triadic

#3F71D5 #D53F71 #71D53F

tetradic

#3F71D5 #D53FBC #D5A33F #3FD558

square

#3F71D5 #D53FBC #D5A33F #3FD558

split-complementary

#3F71D5 #D5583F #BCD53F

monochromatic

#1C3C7E #2754B0 #3F71D5 #7196E0 #A3BBEB

Accessibility & contrast

On white

4.63

#3F71D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3F71D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71D5

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71D5	#FFFFFF	#000000	##FFFFFF
##3F71D5	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C7CD9

Deuteranopia (green-blind)

#176ED3

Tritanopia (blue-blind)

#008899

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f71d5;
/* rgb */ color: rgb(63, 113, 213);
/* oklch */ color: oklch(56.7% 0.163 262.4);

Tailwind

colors: {
  custom: {
    50: '#8699e2',
    500: '#3f71d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f71d5;
$custom-light: #8699e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71d5",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 213
  },
  "hsl": {
    "h": 220,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.5667,
    "c": 0.16319,
    "h": 262.4
  },
  "luminance": 0.17671
}

Semantic roles & 50–950 ramp

primary

#3F71D5

secondary

#D8C398

accent

#B041E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71D5

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

Preview Lab → · Contrast checker → · Palette generator →