So let me show you how i configured my account step by step. This step is after creating your blog if you dont have you can have that tutorial here.
1. Sign in to your blog by entering username password.
2.Now click SETTINGS tab at your left.
3. Now click BASIC .
4. Now you will see at the right side following settings as in pic below.
5. Now click on SETUP A THIRD PARTY URL FOR YOUR BLOG.
6. Now enter your chosen address which your registered for your blog.
7. Now after clicking the save button ERROR will show don't hasitat as it doesn't matters.
8. Now go to www.namecheap.com enter your username and password, if you dont have and account then
click here and register an account.
9. Now click on MANAGE DOMAINS.

10. Now click on the domain you purchased .
11. Go to all host records.
12. Now go to your blog and copy the words starting with ghs.xxxxx in your domain in front of www as
shown in pic .
13. Now come back to Namecheap and enter the copied details in before CNAME (alias) as shown in pic.
14. Now come to blog again and copy the code down to www as shown in pic.
15. Now paste that copied code before CNAME(alias) as shown in pic.
16. Now come back again to blog and copy the code starting from gv- xxxxxxx .
17. Go back to namecheap domain settings and paste that to next box your already paste the code details in pic.

18. Now SAVE CHANGES you have made.
19. Now i will teach you the next step which might you need if you purchased 1email id with domain , what this means? it means that this id will use your blog name next to it as in my case admin@technocolours.com . How to setup email id let me show you.
20. Click on your domain you registered , then click on SETUP NEW MAILBOX .
21. Ad your desire username and enter password and confirm it.
22. Now click on proceed.
23. Congratulations you have sutup BLOG WITH CUSTOM NAME & EMAIL ID.
Friends i have tried to show you all the details for setting up custom domain, if you need any of help then dont hasitate to ask me at admin@technocolours.com .