Dear Programmers,Since we spend long hours in front of the screen, a good trusted color syntax theme is necessary. Here is a well tested color theme based on the famous Oblivion style. 
		<colour_sets>
			<default />
			<ACTIVE_COLOUR_SET>
				<str>
					<![CDATA[oblivion]]>
				</str>
			</ACTIVE_COLOUR_SET>
			<ACTIVE_LANG>
				<str>
					<![CDATA[C/C++]]>
				</str>
			</ACTIVE_LANG>
			<oblivion>
				<NAME>
					<str>
						<![CDATA[oblivion]]>
					</str>
				</NAME>
				<cc>
					<style0>
						<FORE>
							<colour r="238" g="238" b="236" />
						</FORE>
						<BACK>
							<colour r="46" g="52" b="54" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[Default]]>
							</str>
						</NAME>
					</style0>
					<style1>
						<FORE>
							<colour r="136" g="138" b="133" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Comment (normal)]]>
							</str>
						</NAME>
					</style1>
					<style2>
						<FORE>
							<colour r="136" g="138" b="133" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Comment (normal)]]>
							</str>
						</NAME>
					</style2>
					<style3>
						<FORE>
							<colour r="52" g="101" b="164" />
						</FORE>
						<BOLD bool="0" />
						<NAME>
							<str>
								<![CDATA[Comment (documentation)]]>
							</str>
						</NAME>
					</style3>
					<style4>
						<FORE>
							<colour r="52" g="101" b="164" />
						</FORE>
						<BOLD bool="0" />
						<NAME>
							<str>
								<![CDATA[Comment (documentation)]]>
							</str>
						</NAME>
					</style4>
					<style6>
						<FORE>
							<colour r="164" g="0" b="0" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Comment keyword error (documentation)]]>
							</str>
						</NAME>
					</style6>
					<style7>
						<FORE>
							<colour r="173" g="127" b="168" />
						</FORE>
						<BACK>
							<colour r="46" g="52" b="54" />
						</BACK>
						<BOLD bool="1" />
						<NAME>
							<str>
								<![CDATA[Number]]>
							</str>
						</NAME>
					</style7>
					<style8>
						<FORE>
							<colour r="233" g="185" b="110" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Keyword]]>
							</str>
						</NAME>
					</style8>
					<style9>
						<FORE>
							<colour r="78" g="154" b="6" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[User keyword]]>
							</str>
						</NAME>
					</style9>
					<style10>
						<FORE>
							<colour r="185" g="49" b="0" />
						</FORE>
						<BACK>
							<colour r="30" g="3" b="0" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[String]]>
							</str>
						</NAME>
					</style10>
					<style11>
						<FORE>
							<colour r="185" g="49" b="0" />
						</FORE>
						<BACK>
							<colour r="30" g="3" b="0" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[String]]>
							</str>
						</NAME>
					</style11>
					<style12>
						<FORE>
							<colour r="245" g="121" b="0" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Character]]>
							</str>
						</NAME>
					</style12>
					<style13>
						<FORE>
							<colour r="211" g="215" b="207" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[UUID]]>
							</str>
						</NAME>
					</style13>
					<style14>
						<FORE>
							<colour r="78" g="154" b="6" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Preprocessor]]>
							</str>
						</NAME>
					</style14>
					<style15>
						<FORE>
							<colour r="233" g="185" b="110" />
						</FORE>
						<NAME>
							<str>
								<![CDATA[Operator]]>
							</str>
						</NAME>
					</style15>
					<style16>
						<BACK>
							<colour r="23" g="32" b="24" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[Selection]]>
							</str>
						</NAME>
					</style16>
					<style17>
						<BACK>
							<colour r="24" g="33" b="33" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[Active line]]>
							</str>
						</NAME>
					</style17>
					<style18>
						<BACK>
							<colour r="114" g="159" b="207" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[Matching brace highlight]]>
							</str>
						</NAME>
					</style18>
					<style19>
						<FORE>
							<colour r="238" g="238" b="236" />
						</FORE>
						<BACK>
							<colour r="164" g="0" b="0" />
						</BACK>
						<NAME>
							<str>
								<![CDATA[No matching brace highlight]]>
							</str>
						</NAME>
					</style19>
					<NAME>
						<str>
							<![CDATA[C/C++]]>
						</str>
					</NAME>
					<editor>
						<keywords />
					</editor>
				</cc>
			</oblivion>
		</colour_sets>
 How to Install the Theme? Step 0: Make sure that Code::Blocks is closed along with all its associated files.
Step 1: Navigate to: 
~/.codeblocks/Step 2: Locate the Default configuration file: 
default.confStep 3: Edit the file using your favorite editor.
Step 4: Locate the 
<colour_sets> </colour_sets> tags.
Step 5: Copy the above code to replace those tags.
Step 6: Save the file. 
Note: I have attached my default.conf file for further assistance.Kind Regards,