How to invert colors gimp

I know how to Invert Colors but is it possible to swap Colors?For example from this one:


To this one:


So that I select one Area and also then swap Colors (or also the complete Layer/Picture)?By the means I am using Gimp 2.8.10

-Edit:I discovered this this is just for one Color and didnt occupational for me via the various shade tones of transparency and it just works through one color at a time, wbelow I need both colors swapped.

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If you have actually more than a couple of, but less than 256 colors, you can work in indexed mode and also reverse the ordering of the colors.

This deserve to be done in 3 steps:

duplicate and also save palettereverse ordering of colormapuse the stored palette

Here a comprehensive explacountry of these 3 steps:

Palettes dialog (Windows -> Dockable dialogs -> Palettes): right click on the existing colormap, choose "Duplicate Palette", choose a new name (e.g. original palette), and also save it.Rearvariety Colormap (Colors -> Map -> Rearselection Colormap): ideal click, then click "Reverse order", click ok.Set Colormap (Colors -> Map -> Set Colormap): click on the Palette and choose the palette conserved in step 1, click ok.
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answered Feb 9 "17 at 9:05

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In such an easy picture, not extremely challenging. The standard principle is that the message is made of pixels of differing opacity (fully opaque for most, however partially opaque on the edges) overlaying a background. So what we need to execute is to recoup that opacity, and use it as soon as repaint through new colors. Note that this strategy works to change foreground/background to any color, not just to exchange them.

So, founding with:


We usage Colors>Color to alpha to rerelocate the background shade. The remaining pixels have actually precisely the opacity crucial to reproduce the text:


We deserve to then paint through the exact same opacity by setting the alpha-lock on the layer. The alpha-lock is the checkerboard symbol in the "lock" line at the optimal of the Layers list. When it is collection, the opacity of the pixels cannot change. So we can bucket fill the totality layer through the new shade, the color will certainly only "stick" on the opaque pixels (and stick partly on the partly opaque pixels):


To fill the background, we could just include a layer filled via the brand-new background color, relocate it to the bottom of the stack and merge whatever, however tbelow is a faster method: usage the Behind mode of the bucket-fill tool (the "mode" is the selector at the peak of the Device options). In that mode, paint devices only fill transparent pixels, partly fill partially opaque pixels to "match to opacity" through the new color, and also leave alone the opaque pixels. As the name implies, it is tantamount to painting on a layer behind the schosen layer, so after resetting the alpha-lock (because this time we change the opacity of pixels), simply bucket-fill the whole layer through the new background color: