Kyocera Ecosys_P5021 printing only black and white

the printer is instantly popping up from network, but the automatic setup wants to install either a generic PCL6+gutenprint or a C1100 driver. I have built the Ecosys driver from AUR (and installed). Nevertheless the driver insists on printing b/w, although I selected “full color” in settings and the preview shows a color page.
Any ideas what i could do?