#3871CC#3871CC

#3871CC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.153 H 259.4°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3871CC
RGB	rgb(56, 113, 204)
HSL	hsl(217, 59%, 51%)
HSV	hsv(217, 73%, 80%)
CMYK	cmyk(72.5%, 44.6%, 0%, 20%)
CIE-LAB	lab(48.27, 12.38, -52.63)
CIE-LCH	lch(48.27, 54.07, 283.23°)
OKLab	oklab(55.79% -0.0282 -0.1507)
OKLCH	oklch(55.79% 0.153 259.4)
XYZ	xyz(18.4312, 17.0086, 59.4267)
Luminance	0.1701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871CC #CC9338

analogous

#38BBCC #3871CC #4938CC

triadic

#3871CC #CC3871 #71CC38

tetradic

#3871CC #CC38BB #CC9338 #38CC49

square

#3871CC #CC38BB #CC9338 #38CC49

split-complementary

#3871CC #CC4938 #BBCC38

monochromatic

#1C3B6E #29569E #3871CC #6994D8 #99B7E5

Accessibility & contrast

On white

4.77

#3871CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3871CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3871CC

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871CC	#FFFFFF	#000000	##FFFFFF
##3871CC	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437ACF

Deuteranopia (green-blind)

#266CCA

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3871cc;
/* rgb */ color: rgb(56, 113, 204);
/* oklch */ color: oklch(55.8% 0.153 259.4);

Tailwind

colors: {
  custom: {
    50: '#8199dc',
    500: '#3871cc',
    950: '#000000',
  },
}

SCSS

$custom: #3871cc;
$custom-light: #8199dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3871cc",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 204
  },
  "hsl": {
    "h": 216.892,
    "s": 59.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.55786,
    "c": 0.15333,
    "h": 259.4
  },
  "luminance": 0.17011
}

Semantic roles & 50–950 ramp

primary

#3871CC

secondary

#D1B78F

accent

#A645E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3871CC

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

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