I don't believe you can, but what you could do is play around with the CSS alpha settings and create the chart twice and layer it one on top of the other.
-- You received this message because you are subscribed to the Google Groups "Google Chart API" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-chart-api/-/sjxmajFuADMJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-chart-api?hl=en.
