Step One – Login to twitter and head to the Design section on to this link http://twitter.com/settings/design
Step Two – Grab the code below:
Step Three – Go to the address bar on your browser (where it says http://twitter.com/settings/design) and select the URL. Copy over it with the code from above. Just like this.
Now you just need to hit Enter/line break/return to make the change take effect.
Step Four – You should see this message appear if its all went well:
Final Step – Hit the save button at the bottom of the Design page and your done
And you can see that the sidebar is now transparent:
Now what if you want to change back to a normal sidebar with a coloured background. No probs. Just login into the design page again and select “Change Design Styles” and hit save and your all sorted.