Thanks for your answer, but I do not get it.
I can only set the titles with an array, not one after each other. Am I wrong?
my code:
$graph = new Graph\RadarGraph(1140, 850);
$graph->SetCenter(0.52, 0.5);
$graph->SetScale('lin', 0, 3);
$graph->SetFrame(false);
$graph->legend->SetPos(0.77,0.02,'left','top');
$graph->legend->SetFont(FF_ARIAL,FS_NORMAL,16);
$titles=['Lorem', 'Ipsum', 'Dolor', 'Sit', 'Amet'];
$graph->SetTitles($titles);
eg. I would like to color Lorem red, Ipsum blue, ....