Portal Login page color change

Hello SDN,

Im working on portal branding. I have to change the login page color to Blue.I have changed thelogin page logo by making changes in the PAR file <b>sap.portal.runtime.logon.par</b>. But i was confused where can i change the background color of whole page.

Please help me out regarding this.

Reward points assured.

Thanks & Regards,

Ravi