You can try manually setting your preferred colour from any other scheme for just that shape.
Alternatively, you can place that shape on secondary axis and don't add any colour encoding.
The exact method will depend on your data and sheet layout, an example workbook would help.
When I try to insert my custom shape, it comes out with the Tableau color over it, which blocked one of the internal colours within this icon (there should be a little white bike on the inside, which is blocked by the Tableau colour). I have attached a screen shot.
Any ideas how to get around this?
I think your bike should be transparent not white - then it won't get colored
Thanks very much for the reply.
I have made the internal bike transparent, but now its not visible.
Am I missing something?