Syntax highlighting/Code Pretiffier is used for giving a piece of code more presentable look and attraction.
This google-code-prettify was developed by Mike Samuels from Google. You will be learning to imply this feature on your blog.
■ Open
Blog Dashboard → Template → Html Editor
■ Find
</head> ( pressing Ctrl+F )
■ Now paste the below given code just
before/above it.
Javascript
<script src="https://google-code-prettify.googlecode.com/svn/loader/run_prettify.js" type="text/javascript"/>
■ Hit the
Save button and preview the syntax codes of your blog now.
■ You also can change the look of syntax by adding pre-designed CSS codes.
■ Add below CSS code just
above/before
]]></b:skin>
1.Default

CSS
/* Pretty printing styles. Used with prettify.js. */
/* SPAN elements with the classes below are added by prettyprint. */
.pln { color: #000 } /* plain text */
@media screen {
.str { color: #080 } /* string content */
.kwd { color: #008 } /* a keyword */
.com { color: #800 } /* a comment */
.typ { color: #606 } /* a type name */
.lit { color: #066 } /* a literal value */
/* punctuation, lisp open bracket, lisp close bracket */
.pun, .opn, .clo { color: #660 }
.tag { color: #008 } /* a markup tag name */
.atn { color: #606 } /* a markup attribute name */
.atv { color: #080 } /* a markup attribute value */
.dec, .var { color: #606 } /* a declaration; a variable name */
.fun { color: red } /* a function name */
}
/* Use higher contrast and text-weight for printable form. */
@media print, projection {
.str { color: #060 }
.kwd { color: #006; font-weight: bold }
.com { color: #600; font-style: italic }
.typ { color: #404; font-weight: bold }
.lit { color: #044 }
.pun, .opn, .clo { color: #440 }
.tag { color: #006; font-weight: bold }
.atn { color: #404 }
.atv { color: #060 }
}
/* Put a border around prettyprinted code snippets. */
pre.prettyprint { padding: 2px; border: 1px solid #888 }
/* Specify class=linenums on a pre to get line numbering */
ol.linenums { margin-top: 0; margin-bottom: 0 } /* IE indents via margin-left */
li.L0,
li.L1,
li.L2,
li.L3,
li.L5,
li.L6,
li.L7,
li.L8 { list-style-type: none }
/* Alternate shading for lines */
li.L1,
li.L3,
li.L5,
li.L7,
li.L9 { background: #eee }
2. Sunburst

CSS
/* Pretty printing styles. Used with prettify.js. */
/* Vim sunburst theme by David Leibovic */
pre .str, code .str { color: #65B042; } /* string - green */
pre .kwd, code .kwd { color: #E28964; } /* keyword - dark pink */
pre .com, code .com { color: #AEAEAE; font-style: italic; } /* comment - gray */
pre .typ, code .typ { color: #89bdff; } /* type - light blue */
pre .lit, code .lit { color: #3387CC; } /* literal - blue */
pre .pun, code .pun { color: #fff; } /* punctuation - white */
pre .pln, code .pln { color: #fff; } /* plaintext - white */
pre .tag, code .tag { color: #89bdff; } /* html/xml tag - light blue */
pre .atn, code .atn { color: #bdb76b; } /* html/xml attribute name - khaki */
pre .atv, code .atv { color: #65B042; } /* html/xml attribute value - green */
pre .dec, code .dec { color: #3387CC; } /* decimal - blue */
pre.prettyprint, code.prettyprint {
background-color: #000;
-moz-border-radius: 8px;
-webkit-border-radius: 8px;
-o-border-radius: 8px;
-ms-border-radius: 8px;
-khtml-border-radius: 8px;
border-radius: 8px;
}
pre.prettyprint {
width: 95%;
margin: 1em auto;
padding: 1em;
white-space: pre-wrap;
}
/* Specify class=linenums on a pre to get line numbering */
ol.linenums { margin-top: 0; margin-bottom: 0; color: #AEAEAE; } /* IE indents via margin-left */
li.L0,li.L1,li.L2,li.L3,li.L5,li.L6,li.L7,li.L8 { list-style-type: none }
/* Alternate shading for lines */
li.L1,li.L3,li.L5,li.L7,li.L9 { }
@media print {
pre .str, code .str { color: #060; }
pre .kwd, code .kwd { color: #006; font-weight: bold; }
pre .com, code .com { color: #600; font-style: italic; }
pre .typ, code .typ { color: #404; font-weight: bold; }
pre .lit, code .lit { color: #044; }
pre .pun, code .pun { color: #440; }
pre .pln, code .pln { color: #000; }
pre .tag, code .tag { color: #006; font-weight: bold; }
pre .atn, code .atn { color: #404; }
pre .atv, code .atv { color: #060; }
}
You can find more styles
here.