“Transparent” is not really a color. It describes some object that allows the light transmission without scattering it. The necessity to change a certain image color for transparent is essential for web design and for PowerPoint presentations. Images with transparent backgrounds can be matched with any colors of the web pages. To achieve transparency effect there are 2 image formats to deal with: GIF and PNG. GIF is the original format supporting transparency, but it can support only 1-bit transparency and cannot provide partial transparency. In other words, each pixel is either completely transparent or not, so you cannot do things like smooth drop shadows that fade away gradually. When PNG was developed, it was supposed to surpass GIF in many of its qualities. It supports high color and partial transparency using alpha channels. In case your image is intended for PowerPoint presentations or other on-screen display, PNG is the way to go. When you ins ert any type of bitmap graphic in to PowerPoint, there are always four sides to the image. Sometimes you just want to see your logo or graphic without the background being visible. This effect is easy to achieve with transparency. ImageConverter Plus offers several ways for changing any color for transparent. Learn how to achieve transparency via the command-line.