You will see some files and folders there; right click over your current theme’s .theme file and open it with notepad:
If you find it difficult; just open the Notepad; click File > Select Open and change the file type to “all files” from”text files”:
Browse to Windows > Resources > Themes and select the .theme file you are using now; it will open with Notepad like this:
Just scroll down a bit, you will find the string :
[Control Panel / Colors]
Why I am showing you a wrong screenshot? Because; I discovered not all theme files have this string! Infact, in 64 bit the string is absent in most of the theme files!
In 32 bit you will get this:
HotTrackingColor=xyz abc pqr
Now, you need a software to get the values for the colors.
Note that, a color may have double digit value not triple ; i.e., abc=52 xyz=34 pqr=78 ; the values represent RGB value.
Save the edited file in desktop or some convenient place. Just replace the original one with this one. Remember to save the file as “all files”.
Done. As you can see all the default blue color in the notepad screenshot has been changed to green.
Note: If you add the string in 64 bit; the colors of hyperlinks will be changed; not the selection colors.
Thanks to flexdaw for sharing this idea and the 32 bit screenshot has been used belongs to him.