Optional border on the line that is used to improve the contrast of the line color against various background colors.
Referenced by: Callout
Properties
| Property | Details | 
|---|---|
| color | Color is represented as a three or four-element array. | 
| transparency | A value between 100 (full transparency) and 0 (full opacity). | 
border Example
{
  "color": [
    255,
    255,
    255
  ],
  "transparency": 50
}