This tutorial will explains to you how change coloure of you selected text and His backgrouunds. This Is very easy to do But have a one problem this method is not working in IE but i Think this will helpfull to you Add some attrackion TO Your Website Follow The Steps:-

1 login Your Blogger DashBoard -->Layout -->Edit HTML

2 Scroll Down To Where you See </head> tag

3 Copy below code And Past It Just Before the </head> tag
<style type="text/css"> ::selection {background:#cc0000;color:#ffffff;} ::-moz-selection{background:#cc0000;color:#ffffff;} code::selection {background: #333333;color:#ffffff;} code::-moz-selection {background: #333333;color:#ffffff;} pre::selection {background: #44ceff;color:#ffffff;} pre::-moz-selection {background: #44ceff;color:#ffffff;} </style>">


Hear is your result look like:-