Editing The "Free SEO Analysis" Button Color

In the 1.9 theme generation and above, this button is not a menu item anymore.

In order to edit the background color or this button, you need to edit a "Button module" from Live Composer following then next steps:

1
Go to WP Admin > Appearance > Headers/Footers and select the header you are using. In the case you are using the demo content, open in Live Composer the "Header - default design".
2
Click on the "cog icon" of the "Button module".  
3
Open the "Styling" tab of the module and edit the module styles. The background option is located in the "General" section.  

If you are using a theme version with Mega Main Menu plugin, follow the next instructions

1
Go to  WP Admin > Mega Main Menu > Skins, then scroll down.

2
Select  Style 1 in  Additional Styles, and change the colors in  Background Gradient (Color)