Gimp smooth edges coloring

Question

I have a PNG image with transparency. It is an icon of single color and I want to change its color.

What I have done so far is,

1. Select the area I want, either by Fuzzy select or the color select tool.
2. Color with the bucket fill.

However I get rough edges, not blended with the transparent background.

How can I achieve that?

Answer 1

I found a solution to my problem that is the following,

1. Select what you want NOT faded. Use any selection tool you want.
2. Next go to Select > Invert
3. Now go to Select > Feather - feather by 3
4. Select Edit > Clear

In case the image is already anti-aliased,

1. Right click on the Layer from the Layers Dock
2. Select Alpha to Selection
3. Bucket Fill