How Do I Select a Specific Color in GIMP?

To select a specific color in GIMP, you can use the "By Color Select" tool. Here's how:

Using the "By Color Select" Tool

You can activate the "By Color Select" tool in three ways:

From the Image Menu Bar: Go to Tools → Selection Tools → By Color Select.
From the Toolbox: Click on the "By Color Select" tool icon in the Toolbox. The icon typically looks like a pointing hand selecting a colored square.
Using the Keyboard Shortcut: Press Shift + O.

Activate the Tool: Use one of the methods described above.
Click on the Color: Click on the color within your image that you want to select. GIMP will then select all contiguous pixels that are similar in color to the pixel you clicked on.

The "By Color Select" tool has several options that allow you to fine-tune your selection:

Threshold: This option controls the range of colors that will be selected. A lower threshold will select only colors very similar to the color you clicked on, while a higher threshold will select a wider range of colors. You can adjust the threshold in the Tool Options dock.
Feather Edges: This option softens the edges of your selection, creating a smoother transition.
Anti-aliasing: Reduces jagged edges in the selection.
Sample Merged: This option allows you to select colors based on the merged result of all visible layers, rather than just the active layer.

Let's say you have an image of a field of flowers and you want to select all the red flowers.

Activate the "By Color Select" tool.
Click on a red flower in the image.
If not all the red flowers are selected, increase the "Threshold" value in the Tool Options and click on the flower again. Repeat until all the desired red flowers are selected.
You can add to the selection by holding Shift and clicking on areas not yet selected or subtract from the selection by holding Ctrl and clicking on the selected areas.

By using the "By Color Select" tool and adjusting the tool options, you can easily select specific colors in your GIMP images.