#3871D7#3871D7

#3871D7 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.5% C 0.168 H 261.0°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3871D7
RGB	rgb(56, 113, 215)
HSL	hsl(218, 67%, 53%)
HSV	hsv(218, 74%, 84%)
CMYK	cmyk(74%, 47.4%, 0%, 15.7%)
CIE-LAB	lab(48.95, 16.42, -57.81)
CIE-LCH	lch(48.95, 60.09, 285.86°)
OKLab	oklab(56.53% -0.0263 -0.1659)
OKLCH	oklch(56.53% 0.168 261)
XYZ	xyz(19.7973, 17.5551, 66.6219)
Luminance	0.1756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871D7 #D79E38

analogous

#38C0D7 #3871D7 #4F38D7

triadic

#3871D7 #D73871 #71D738

tetradic

#3871D7 #D738C0 #D79E38 #38D74F

square

#3871D7 #D738C0 #D79E38 #38D74F

split-complementary

#3871D7 #D74F38 #C0D738

monochromatic

#193C7C #2355AF #3871D7 #6B95E1 #9EBAEB

Accessibility & contrast

On white

4.65

#3871D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3871D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3871D7

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871D7	#FFFFFF	#000000	##FFFFFF
##3871D7	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)

#397CDB

Deuteranopia (green-blind)

#066DD5

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3871d7;
/* rgb */ color: rgb(56, 113, 215);
/* oklch */ color: oklch(56.5% 0.168 261.0);

Tailwind

colors: {
  custom: {
    50: '#8399e4',
    500: '#3871d7',
    950: '#000000',
  },
}

SCSS

$custom: #3871d7;
$custom-light: #8399e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3871d7",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 215
  },
  "hsl": {
    "h": 218.491,
    "s": 66.527,
    "l": 53.137
  },
  "oklch": {
    "l": 0.56529,
    "c": 0.16801,
    "h": 261
  },
  "luminance": 0.17557
}

Semantic roles & 50–950 ramp

primary

#3871D7

secondary

#D8BF93

accent

#AC3EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3871D7

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

Preview Lab → · Contrast checker → · Palette generator →