how to make a gridview printable in colors in aspx?

I want to make a grid that the users will print and that will display it's rows in different colors on the printable version I'm using ASPX

It seems that even you make the colors right, when you pri开发者_运维知识库nt it , the colors are disapearing

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If you are using IE, this is a browser setting. In IE, under Tools -> Internet Options -> Advanced -> Printing you will see a setting called "Print background colors and images".