How do you use eyedropper color in Illustrator?

To use the Eyedropper tool in Adobe Illustrator to sample and apply color, follow these steps:

Select the Eyedropper Tool: In the Tools panel, click on the Eyedropper Tool icon (it looks like an eyedropper).
Sample a Color: Click on any object or area containing the color you want to sample.
- Within Illustrator: Simply click on an object within your Illustrator document that has the desired color.
- Outside Illustrator: Click and hold with the Eyedropper tool anywhere in your Illustrator document, then drag to the color you want to sample outside of Illustrator, and release. This adds the color to your color panel, to the fill or stroke, depending on whichever is active.
Apply the Color: The sampled color will automatically be applied to the currently selected object's fill or stroke, depending on which is active in the Tools panel (Fill or Stroke).

Detailed Explanation

Activate the Eyedropper Tool: Locate the Eyedropper Tool in the toolbar.
Select the Target Object: Choose the object you want to change the color of.
Sample the Color: Click on the area with the color you want to replicate.
Observe the Change: The target object's fill or stroke will now match the sampled color.

Sampling Outside Illustrator: You can sample colors from anywhere on your screen, even outside the Illustrator application window.
Fill or Stroke: Ensure the correct attribute (Fill or Stroke) is active in the Tools panel before sampling the color, as the sampled color will be applied to the active attribute.
Keyboard Shortcuts: You can temporarily switch to the Eyedropper tool by pressing the "I" key.