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Using this pane you can easily select a background color. The pane is optional, it can be switched on/off with the checkbox located on the left of the pane's name. If the checkbox is disabled, the background color will be the original value. In the 'New image' mode it will be a background color, selected when creating this document. In the 'Open image file' mode a loaded image will be a background for generated image.
 
 
The pane contains information about the current color in the RGB color space in decimal and hexadecimal formats. The hexadecimal format is used for color representation in HTML. On the right of the information there is a color field, which displays a selected color. When you click on it, the 'Select color' dialog will appear, where you can choose a color from palettes (see Curve color).
 
Transparent background
 
This option allows you to create a transparent background (for images with alpha channel). Subsequently, such images can be overlayed on any background. This can be useful for creating logos, icons, avatars, etc. Enable the checkbox, if you want to create such image. After that you can press the 'Ok' button at the bottom right of the main window and go to the host application for further processing (Plug-in version) or to save the image to a file (you must select a file format which supports images with transparent background, such as .png).