adding a background image to a task bar instead of color

Gantt
#1

How can I override the default color scheme for tasks and insert a background image instead? Can I insert a repeatable background? Is this even possible?

If not can I add multiple layers of color to the background?

#2

Hello,

You can redefine default background by css:
snippet.dhtmlx.com/9482b16e9

#3

Perfect, thank you!