Sawayaka Background for Google Plus is a free Chrome extension developed by ksaga. This extension aims to provide a more comfortable browsing experience on the Google Plus site by allowing users to change the background color.

By using this simple extension, users can easily modify the default background color of Google Plus, which is a bright shade. To change the color, simply hover your mouse over the designated area highlighted in red in the provided screenshot, and enter the desired color code into the box.

In addition to the background color feature, Sawayaka Background for Google Plus also offers the option to darken or lighten the font colors of G+ text. This can further enhance the readability and visual appeal of the site.

Please note that this extension does not require any personal information and is completely free to use. It is a convenient tool for users who find the original Google Plus background color too bright and prefer a more comfortable browsing experience.