strokeColor property
The colors to use when the type is BORDER_TYPE_STROKE.
To set the stroke color, specify a value for the red, green, and
blue fields. The value must be a float number between 0 and 1 based on
the RGB color value, where 0 (0/255) represents the absence of color and
1 (255/255) represents the maximum intensity of the color. For example,
the following sets the color to red at its maximum intensity: "color": { "red": 1, "green": 0, "blue": 0, } The alpha field is unavailable
for stroke color. If specified, this field is ignored.
Implementation
Color? strokeColor;