Gradient Border Using GIMP

Question

I am starting with a blank canvas in GIMP. I want to create a gradient border around the entire perimeter of the image. I am not looking for fade to transparency or feathering the edges (which there are many tutorials for).

I want to create a Gradient using the gradient tool that goes from foreground color to background color. Unfortunately the gradient tool only allows you to do 1 of the 4 edges. How can I do this using the gradient tool?

Here is the bad part. I've done this before and can't remember how I did it. I attached a picture so you can see what I'm trying to do. I need to do it again because I want to change the color.

Answer 1

Another method:

1. Set foreground/backgroud to the two colors
2. Select>All
3. Start the Blend tool, with
   • gradient: FG to BG (RGB)
   • shape: Shaped (Spherical)
4. Click and drag on the image, this will create a shaped gradient, as well as adding a control line.
5. Click on the middle of the line to add a control point, and slide it to adjust the color transition. You can also change the blend characteristic (used Spherical(decreasing))

6. Strike [enter] or double-click when happy with the result
7. You can apply a bit of Gaussian blur to the result:

Answer 2

Have 2 empty layers, both full sized and with alpha channel or at least the top layer must have alpha channel

Fill the bottom layer with the background color.

Make a rectangular selection, smaller than the layer and fill it with the foreground color in the top layer:

Blur the top layer:

Keep the layers separate as long as you are not sure if some adjustments are needed.