#3871D9#3871D9

#3871D9 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.7% C 0.171 H 261.2°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3871D9
RGB	rgb(56, 113, 217)
HSL	hsl(219, 68%, 54%)
HSV	hsv(219, 74%, 85%)
CMYK	cmyk(74.2%, 47.9%, 0%, 14.9%)
CIE-LAB	lab(49.08, 17.16, -58.73)
CIE-LCH	lch(49.08, 61.19, 286.28°)
OKLab	oklab(56.67% -0.026 -0.1687)
OKLCH	oklch(56.67% 0.171 261.2)
XYZ	xyz(20.0559, 17.6585, 67.9836)
Luminance	0.1766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871D9 #D9A038

analogous

#38C1D9 #3871D9 #4F38D9

triadic

#3871D9 #D93871 #71D938

tetradic

#3871D9 #D938C1 #D9A038 #38D94F

square

#3871D9 #D938C1 #D9A038 #38D94F

split-complementary

#3871D9 #D94F38 #C1D938

monochromatic

#183C7E #2255B2 #3871D9 #6B96E3 #9FBAED

Accessibility & contrast

On white

4.63

#3871D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3871D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3871D9

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871D9	#FFFFFF	#000000	##FFFFFF
##3871D9	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#377CDD

Deuteranopia (green-blind)

#006ED7

Tritanopia (blue-blind)

#008A9A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3871d9;
/* rgb */ color: rgb(56, 113, 217);
/* oklch */ color: oklch(56.7% 0.171 261.2);

Tailwind

colors: {
  custom: {
    50: '#8499e5',
    500: '#3871d9',
    950: '#000000',
  },
}

SCSS

$custom: #3871d9;
$custom-light: #8499e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3871d9",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 217
  },
  "hsl": {
    "h": 218.758,
    "s": 67.932,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56667,
    "c": 0.17067,
    "h": 261.2
  },
  "luminance": 0.17661
}

Semantic roles & 50–950 ramp

primary

#3871D9

secondary

#D9C094

accent

#AD3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3871D9

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

Preview Lab → · Contrast checker → · Palette generator →