Hi, I noticed this question was unanswered. I hope you got the answers. Just in case, here are some resources on how to build custom reports: The reports being black and white could be changed under Configuration/user preferences/Themes/Print/Report -monochrome (change it to Color). More information here: [URL] Regards Gaston
Also, I tried to create some reports but the charts are coming black and white instead of with colors.
need help in understanding the creation of custom build reports as well as 
parameterized input + charts creation.