#3870D9#3870D9

#3870D9 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.5% C 0.172 H 261.6°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX#3870D9
RGBrgb(56, 112, 217)
HSLhsl(219, 68%, 54%)
HSVhsv(219, 74%, 85%)
CMYKcmyk(74.2%, 48.4%, 0%, 14.9%)
CIE-LABlab(48.81, 17.79, -59.18)
CIE-LCHlch(48.81, 61.79, 286.73°)
OKLaboklab(56.46% -0.0252 -0.17)
OKLCHoklch(56.46% 0.172 261.6)
XYZxyz(19.9449, 17.4366, 67.9466)
Luminance0.1744 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3870D9 #D9A138
analogous
#38C1D9 #3870D9 #5038D9
triadic
#3870D9 #D93870 #70D938
tetradic
#3870D9 #D938C1 #D9A138 #38D950
square
#3870D9 #D938C1 #D9A138 #38D950
split-complementary
#3870D9 #D95038 #C1D938
monochromatic
#183C7E #2254B2 #3870D9 #6B95E3 #9FBAED

Accessibility & contrast

On white

4.68
#3870D9 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.49
#3870D9 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870D9
4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3870D9#FFFFFF#000000##FFFFFF
##3870D91.004.684.494.68
#FFFFFF4.681.0021.001.00
#0000004.4921.001.0021.00
##FFFFFF4.681.0021.001.00

Color blindness preview

Protanopia (red-blind)
#347CDD
Deuteranopia (green-blind)
#006DD7
Tritanopia (blue-blind)
#00899A
Achromatopsia (no color)
#747474

Design tokens & code

CSS
--color: #3870d9;
/* rgb */ color: rgb(56, 112, 217);
/* oklch */ color: oklch(56.5% 0.172 261.6);
Tailwind
colors: {
  custom: {
    50: '#8498e5',
    500: '#3870d9',
    950: '#000000',
  },
}
SCSS
$custom: #3870d9;
$custom-light: #8498e5;
$custom-dark: #000000;
JSON
{
  "hex": "#3870d9",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 217
  },
  "hsl": {
    "h": 219.13,
    "s": 67.932,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56457,
    "c": 0.17184,
    "h": 261.6
  },
  "luminance": 0.17439
}

Semantic roles & 50–950 ramp

primary
#3870D9
secondary
#D9C194
accent
#AE3DEB
background
#F8F9FE
surface
#F0F2FC
border
#CBCCD5
text
#0C0D16
muted
#7D7E84

Preview Lab

Preview with #3870D9

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

Preview Lab → · Contrast checker → · Palette generator →

#3870D9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva