"transparent" is a valid color string (for all the chart elements I tried, anyway) - as long as you don't use IE < 9. As I understand it, transparency is broken and/or wonky in VML, which is what IE < 9 uses instead of SVG, and the chart team couldn't find a work-around for it.
On Wednesday, July 11, 2012 3:05:35 PM UTC-4, noiv wrote:
Sometimes it really makes sense. At least treat it same on a same page.
Thanks