There are a few ways to change shirt color in Photoshop. The first way is to use the Hue/Saturation tool. To change the color of a shirt, click on the Hue/Saturation tool and then drag the slider to the left or right to change the color of the shirt. The second way is to use the Color Picker. To change the color of a shirt, click on the Color Picker and then select a color from the list. The last way is to use a gradient tool. To change the color of a shirt, click on the Gradient Tool and then drag one or more colors along the gradient line to create different colors for your shirt.