This article explains how to change your theme in Google Chrome.
Probably in future Google Chrome will have this option integrated into it’s settings or there will be a plugin for that matter, until then you’ll either have to do it manually by replacing one of the system files or use some gadgets already available.
Manually changing Google Chrome theme: You’ll have to replace the
default.dll file you already downloaded from Themes or made yourself.
Path for Windows XP:
C:\Documents and Settings\[your user name]\Local Settings\Application Data\Google\Chrome\[current version]\Themes\default.dll
Path for Windows Vista:
C:\Users\[your user name]\AppData\Local\Google\Chrome\Application\ [current version]\Themes\default.dll
Note: Replace [your user name] with your username! [current version] looks like Application.2.149.27 or Application.2.149.29, use the latest one. The file is located in hidden folders, so in order to view them you’ll have to check the option
"show hidden files and folders" (Go to “My Computer”, select “Tools” from the menu, click “Folder Options” and change to “View” tab, select “show hidden files and folders”).
Automatically changing Google Chrome theme: Not so many options available at the moment, but probably the best tool to use would be XChrome Theme Manager.