var doc = app.activeDocument; 
var allehyperlinks = doc.hyperlinks.everyItem().getElements(); 
for (var i = allehyperlinks.length-1; i >= 0; i--) { 
allehyperlinks[i].fillColor = "blau"; // hier soll der Text Blau werden 
} 

allehyperlinks[i].source.sourceText.fillColor = "blau";