#3871D3#3871D3

#3871D3 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.3% C 0.163 H 260.5°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3871D3
RGB	rgb(56, 113, 211)
HSL	hsl(218, 64%, 52%)
HSV	hsv(218, 73%, 83%)
CMYK	cmyk(73.5%, 46.4%, 0%, 17.3%)
CIE-LAB	lab(48.70, 14.95, -55.94)
CIE-LCH	lch(48.70, 57.90, 284.96°)
OKLab	oklab(56.26% -0.027 -0.1604)
OKLCH	oklch(56.26% 0.163 260.5)
XYZ	xyz(19.2896, 17.3520, 63.9480)
Luminance	0.1735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871D3 #D39A38

analogous

#38BFD3 #3871D3 #4C38D3

triadic

#3871D3 #D33871 #71D338

tetradic

#3871D3 #D338BF #D39A38 #38D34C

square

#3871D3 #D338BF #D39A38 #38D34C

split-complementary

#3871D3 #D34C38 #BFD338

monochromatic

#1A3C76 #2556A9 #3871D3 #6A95DE #9CB9E9

Accessibility & contrast

On white

4.70

#3871D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3871D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3871D3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871D3	#FFFFFF	#000000	##FFFFFF
##3871D3	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D7BD7

Deuteranopia (green-blind)

#166DD1

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3871d3;
/* rgb */ color: rgb(56, 113, 211);
/* oklch */ color: oklch(56.3% 0.163 260.5);

Tailwind

colors: {
  custom: {
    50: '#8299e1',
    500: '#3871d3',
    950: '#000000',
  },
}

SCSS

$custom: #3871d3;
$custom-light: #8299e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3871d3",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 211
  },
  "hsl": {
    "h": 217.935,
    "s": 63.786,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56255,
    "c": 0.16268,
    "h": 260.5
  },
  "luminance": 0.17354
}

Semantic roles & 50–950 ramp

primary

#3871D3

secondary

#D5BC92

accent

#AA41E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3871D3

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

Preview Lab → · Contrast checker → · Palette generator →