Learn to sample a color from your image
Sometimes when you need to grab a color in Lightroom you’d really like to use a color sampled from your image. This is easy to do.
In any situation where you have access to the Color Picker, click on the color swatch to open the Color Picker and hold your mouse over it. Press the left mouse button to get the Eyedropper but don’t let go – instead move out of the dialog and over the image and sample your color from there.