arrayToHex
Converts an array of RGB(A) values to a hex color. If the array has transparency, the hex color will be in the format #AARRGGBB.
Arguments
array- The RGB(A) array to convert.
Example
{
  "$template": {
    "$comment": "The field below will be '#336699'",
    "test": "{{arrayToHex([0.2, 0.4, 0.6])}}"
  }
}