Hi Mike,
Thank you for using Sycnfusion products.
Currently, in xlsio we do not have support to set the two color gradient style for an cell. The MS Excel 2003 does not support with this fill style and Excel 2007 & Excel 2010 are supported.We have logged an feature request for this and forwarded to the development team for further analysis.
We are able to set the two color gradient using IFill interface for the shapes in XlsIO. We have created the sample for the same at our side and placed in the below link for your reference.
Sample Link:
Xlsiosample1826495382.zipAnd so we request you to open a new direct-trac incident with a simple issue reproducing sample for further follow up on this feature.
Direct-Trac Link:
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidentsPlease let us know if you require any further clarifications.
Thanks,
Sridhar.S