#3871CF#3871CF

#3871CF is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.0% C 0.157 H 259.9°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3871CF
RGB	rgb(56, 113, 207)
HSL	hsl(217, 61%, 52%)
HSV	hsv(217, 73%, 81%)
CMYK	cmyk(72.9%, 45.4%, 0%, 18.8%)
CIE-LAB	lab(48.45, 13.48, -54.05)
CIE-LCH	lch(48.45, 55.71, 284.00°)
OKLab	oklab(55.99% -0.0276 -0.1549)
OKLCH	oklch(55.99% 0.157 259.9)
XYZ	xyz(18.7944, 17.1539, 61.3399)
Luminance	0.1716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871CF #CF9638

analogous

#38BDCF #3871CF #4B38CF

triadic

#3871CF #CF3871 #71CF38

tetradic

#3871CF #CF38BD #CF9638 #38CF4B

square

#3871CF #CF38BD #CF9638 #38CF4B

split-complementary

#3871CF #CF4B38 #BDCF38

monochromatic

#1B3C71 #2756A3 #3871CF #6994DB #9BB7E7

Accessibility & contrast

On white

4.74

#3871CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3871CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3871CF

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871CF	#FFFFFF	#000000	##FFFFFF
##3871CF	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#407AD3

Deuteranopia (green-blind)

#206DCD

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3871cf;
/* rgb */ color: rgb(56, 113, 207);
/* oklch */ color: oklch(56.0% 0.157 259.9);

Tailwind

colors: {
  custom: {
    50: '#8299de',
    500: '#3871cf',
    950: '#000000',
  },
}

SCSS

$custom: #3871cf;
$custom-light: #8299de;
$custom-dark: #000000;

JSON

{
  "hex": "#3871cf",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 207
  },
  "hsl": {
    "h": 217.351,
    "s": 61.134,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55985,
    "c": 0.15734,
    "h": 259.9
  },
  "luminance": 0.17156
}

Semantic roles & 50–950 ramp

primary

#3871CF

secondary

#D3BA90

accent

#A844E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3871CF

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

Preview Lab → · Contrast checker → · Palette generator →