Magic Wand
Click a pixel to select all pixels of the same color. By default it selects only contiguous (connected) pixels.
Options
- Contiguous — when enabled (default), only connected same-color pixels are selected. Disable it to select every pixel of that color on the layer
Selection modifiers
- Click — replace the current selection
- Shift + click — add to the selection
- Alt + click — subtract from the selection
- Ctrl + Shift + click — intersect with the selection
Save as brush
Turn the selected pixels into a custom brush from the tool options bar.