What do the symbols and colors represent in the first confederate flag?

The colours and symbols are borrowed from the general U.S. federal flag, which was not abandoned fully because citizens of the Confederacy were against abandoning it. The colours and symbols of the U.S. flag bear no special, defined meaning except that the number of bars was equal to the number of rebelling colonies (13) and that the numbers of stars represented the number of states in the Union. Likewise, the Confederate flags used the stars to represents the number of states in their union but their bar colours, like the U.S. flag, had no specific meaning (though some have said that the 'white field' can be interpreted to mean purity).