If the backColor property is not set, then the background color is set to this CSS property:
background: -webkit-linear-gradient(top, rgb(255, 255, 255) 0%, rgb(238, 238, 238));
This gives the event a better look. However, if I set the event to any other color using the backColor property, then I'm just having a flat background color.
If I set the backColor to transparent and use the event's active area, I should be able to have the non flat background.
left: 0, right: 0, top: 0, bottom: 0,
style: "background: -webkit-linear-gradient(top, rgb(255, 255, 255) 0%, rgb(238, 238, 238));"
I tried it and it works basically. However, how can I use the standard version linear-gradient instead of the -webkit- variante and how can I use it for any other color than just white?