If you have ever used ‘apex:tabPanel’, you were probably surprised to see the style of tab differed from other Visualforce elements. For this element, Salesforce apparently uses old style, but I can advise you how to change it.

old tsalesforce ab

You just have to add these 2 lines into your Visualforce page:

These lines include new styles for tabs containing style definitions of standard Salesforce tabs. Afterwards test it with the following test page:

nice salesforce tab