![]() For a Grayscale image the information box displays an Intensity value ranging from 0 to 255, where 0 is black and 255 is white. The hexadecimal format can be used to set colors in web pages, because hex is used for coding color in HTML. The Hex Triplet is the color coded in hexadecimal. For more information on alpha channels, see "Channels And Duotones" starting on page 351. Now, when you erase, cut or clear, you'll get transparent areas instead of the background color in the toolbox. Invoke the Add Alpha Channel command in the right-click|Image| Alpha menu or the right-click|Layers menu to add transparency information to your image. Alpha N/A means that your image contains no alpha channel (see Alpha Channels), or that transparency is not enabled. Just click on a color in an image, and this color will appear as the foreground or background color at the bottom of the toolbox.Ī small information window shows the RGB and Alpha values (see Alpha Channels) of your chosen color. ![]() If you don't want to use any of the palettes available (read more about palettes in The Color Picker), you can just pick a color in your image or in any other images that are currently open in Gimp, so you have many color choices. ![]() The color picker is used for choosing colors. You will soon find that you can achieve much more using the basic paint tools than by applying any of the instant paint filters. To be able to use the more advanced functions in Gimp, you must first learn to control Gimp's basic paint tools.
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