and there is a BIG picture of the image configuration settings Clyde is pointing out in the readme.. (JUST ABOVE the section of the readme you are quoting)

Go to Configuration > Images page inside your admin interface.
[BIG PICTURE IS HERE]
You can tweak everything to your liking. The parameters are pretty self explanatory and feature additional descriptions when you select them. These parameters enable you to tweak settings for

  • preferred filetypes
  • compression quality
  • background color
  • watermarking
  • zooming (fancy hover effect)
  • gravity for watermarking
Quote Originally Posted by hara View Post
Hello,

I can't find the feature that I can change the original image background to match webiste color.

You described:
Choose an image background color matching to match you site's color or select a transparent background for your images.

Please advise. Thanks!
Quote Originally Posted by clydejones View Post
admin -> configuration -> images -> IH small images background

admin -> configuration -> images -> IH medium images background

admin -> configuration -> images -> IH large images background