ios - Transparent Polyline -

this first question here sorry if wrong.

i trying draw polyline in google maps specified color polyline seems not accept alpha channel of color. line solid. how achieved? or possible @ all?

i doing xamarin.ios , google maps control xamarin.ios solution in objective c , google maps sdk ios great too.

i think found solution problem, semi-solution because not every color can reproduced.

i used full green draw line , alpha channel did not seem have effect. when used line rbg color (0,0,10) seems create line semi transparent , green.

so me looks rbg color channels combined color , transparency (or implemented color channel transparency channel full color).