GIMP Version: 2.6.11
Operating System: Windows
OS Version: win7
GIMP Experience: Beginner Level

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Greets,
I have an image "Welcome-02.png"

for which. i would like to change the color of its outermost border pixels,
to "50057B",
no matter what that color is (mostly its color is "F4F2EE", but not always).
How can i change those outermost pixels?
Thanks...vmars316 Vernon

I downloaded your image and saw right away that it had been semiflattened with white even though it was a png image. Is it the white pixels you want to get rid of? If so, this is what I did.

1. Open the image
2. Right-click the layer the image is on and select, Alpha to Selection in the dropdown list.
3. Select > Shrink > 1
4. Select > Invert > Color to Alpha. Make sure white (ffffff) is the color in the color box.
5. White pixels gone.
6. Select > None.

I put a red background behind the image to show the white semi-flattening.


There are also some very dark purple lines outside some of the letters. They can be removed also in the same way but you will need to use the color picker first to get the correct color to put in Color to Alpha. I got color #50057b.

Here is a zoomed in screen shot showing some of them.

Following O's advice then using Rob A's transparent background script to get a decent selection, which is saved to a path, and used to stroke on a transparent layer.

Actually, i want to replace all the white-ish (border) colors with the color #50057b.
The purple(#50057b) pixels, i put there, replacing pixel by pixel white-ish with #50057b.
I want a purple border around each letter.

Flattened, hmm... must have happened when I copied it to the clipboard, then to file.
See this one: no white,

but now my needs change a little bit.
I now want to ADD a '1 pixel border' around the perimeter of each letter.

What you described sounds interesting, I'll try it later.

Thanks...Vernon

The one mahvin did has a purple border around it.

I downloaded Welcome-3.png, did alpha to selection, Select > To Path. Unselected (Ctrl + Shift + A).

I put 50057b (purple) as the foreground color.

Edit > Stroke Path. (See image below)



welcome-4.png has a 1-pixel purple border around it.

Very COOL "O". Ive never used the ToPath or StrokePath before.
Thanks



Ah yes, I am working on that one now.
Thanks...Vernon

Hi vmars316.
You can also do this by selecting the layer of text that has transparency, right click the layer, and select "alpha to selection".Then go to Select . Shrink (shrink by width you want colored differently) Select> Border
Enter your width in pixels - you can now select another foreground color and a new layer.
Fill in the selection.
If you just want a border around existing pixels - select lock selection to image edges.(the border will be outside)
If you want to change existing pixels around the text with a gradual color change select feathering.
If you want to change existing pixels around the text - select nothing (clear all the selection boxes).

This is the way i usually do a border around text because it allows you to save the changed border on a new layer (non-destructive) .

Geez Rod!
Downright Amazing:
1)
Starting with "fsWelcome-3-FlowerLetters-2-0.png" (fs = captured with FastStone)

alpha to selection
Enter your width in pixels - you can now select another foreground color and a new layer.
Fill in the selection.
"fsWelcome-3-FlowerLetters-2-1.png"


2) border around existing pixels:
Starting with "Welcome-3-FlowerLetters-2.png"
Select/Grow 1 pixel
select "lock selection to image edge" / BorderPixel=1
Fill Selection with #"50057b"
"Welcome-3-FlowerLetters-2-2.png"


3) If you want to change existing pixels around the text with a gradual color change select feathering.

4) If you want to change existing pixels around the text - select nothing (clear all the selection boxes).

Thanks Rod,
sorry to say I couldn't get #3 or #4 working.
I can't figure out when to do what.
...Vernon