#3871C4#3871C4

#3871C4 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.3% C 0.143 H 258.0°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3871C4
RGB	rgb(56, 113, 196)
HSL	hsl(216, 56%, 49%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(71.4%, 42.3%, 0%, 23.1%)
CIE-LAB	lab(47.80, 9.44, -48.81)
CIE-LCH	lch(47.80, 49.71, 280.95°)
OKLab	oklab(55.27% -0.0297 -0.1395)
OKLCH	oklch(55.27% 0.143 258)
XYZ	xyz(17.4962, 16.6346, 54.5026)
Luminance	0.1664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871C4 #C48B38

analogous

#38B7C4 #3871C4 #4538C4

triadic

#3871C4 #C43871 #71C438

tetradic

#3871C4 #C438B7 #C48B38 #38C445

square

#3871C4 #C438B7 #C48B38 #38C445

split-complementary

#3871C4 #C44538 #B7C438

monochromatic

#1D3A65 #2A5694 #3871C4 #6692D3 #96B4E1

Accessibility & contrast

On white

4.85

#3871C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3871C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3871C4

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871C4	#FFFFFF	#000000	##FFFFFF
##3871C4	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4978C7

Deuteranopia (green-blind)

#316BC2

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3871c4;
/* rgb */ color: rgb(56, 113, 196);
/* oklch */ color: oklch(55.3% 0.143 258.0);

Tailwind

colors: {
  custom: {
    50: '#8099d6',
    500: '#3871c4',
    950: '#000000',
  },
}

SCSS

$custom: #3871c4;
$custom-light: #8099d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3871c4",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 196
  },
  "hsl": {
    "h": 215.571,
    "s": 55.556,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55265,
    "c": 0.1426,
    "h": 258
  },
  "luminance": 0.16637
}

Semantic roles & 50–950 ramp

primary

#3871C4

secondary

#CCB28C

accent

#A249DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3871C4

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

Preview Lab → · Contrast checker → · Palette generator →