I have created a simple square using GIMP which color is a shade of blue (#07192c). Click the foreground color to change. I have a file with two layers. As I move the Color Picker across, what appears to be a trasparent background. This guide uses GIMP to add transparency using the free-select tool. They both have alpha channels. The “Change Foreground Color” dialog allows you to set the foreground color. I’ve been researching my eraser issue with no luck for a while. Maybe your image is saving correctly but how your are viewing is supplying a black background which would be viewable through the alpha layer? One layer has the drawn parts I’m trying to erase, the other is a layer with color so I can see my black drawing against something other than transparency. I lowered the opacity on this square a bit, and realized I like the shade of blue which was now created from lowering the opacity. You can simply add a transparent layer above your image and fill this transparent layer with a color gradient. Follow the steps below to add a gradient overlay in GIMP. Using Color to Alpha only removes one color. In GIMP, adding a gradient overlay to an image is not a big deal. There are two different approaches used by graphic file formats for supporting transparent image areas: simple binary transparency and alpha transparency. From gimp 2.8.22 I've successfully saved an alpha channel in a png image that shows the css background color through the image correctly when used as the src in an img tag in an html file. To the right of that bar is an image of a dropper. You'll notice by watching the color swatch in the tool options dialog, Is there a way I can make the transparent background display as something other than the default grid, for example as a simple white background? Either save the image as a PNG file else merge the layers then save it … For this example set the color to black, RGB (0, 0, 0): Change the color to black. Although the background my appear to be one solid color. My question is, does GIMP have a function which allows you to select (like the eyedropper) the color of a transparent layer? For my posting thumbnails i wanted to use a transparent gradient (my pictures should fade from opaque to transparent). As you can see in the GIF image below. Adding a Transparent Background Using GIMP: While making an object's background transparent is easy for solid colors, in most cases, the background tends to have other details that make this troublesome. When removing the background from an image in GIMP, it's best to use an image in which the background is as close to one color as possible. Compositions in GIMP always contain some sort of channels to determine how colors will be displayed in the composition. These channels make up what’s called the Color Space. Click File in the top-left corner of the window (Windows) or the screen (Mac), then click Open... in the drop-down menu, select an image to open, and click Open.. Left-click the dropper then left-click the color on your image that you’d like to make transparent. In actuality it could be made of numerous colors. With the foreground color set, you can now use the Bucket Fill Tool to fill in the selection. Simple binary transparency is supported in the GIF format; one color from the indexed color palette is marked as the transparent color. I'm using Gimp 2. And while i like open source and dont have photoshop at home, i thought, that i could do that with gimp. First off, launch GIMP … The default grid-style transparent background makes it incredibly difficult to get a sense of what the image will actually look like, when I finally display it over a background. 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