In this tutorial I will show you how to change colors using only the color replacement tool. This is the most powerful way to change colors and the easiest.
In this Photoshop Tutorial you will see how to change clothes color. First we will make a selection using the Quick Selection Tool and after that we will add a Solid Color Layer with the color that we want, now change the Blending Mode to Multiply. You can lower the opacity as much as you like. Now you can add a Levels Adjustment Layer and increase the Shadows and Highlights. For last I will show you how to use multiple colors with the Gradient Tool
In this tutorial I will show you how to change the color of any car fast with the Hue/Saturation Adjustment Layer. First make a duplicate of the layer and then add the Hue/Saturation layer and then select the hand and sample the car color, usually a darker tone. Now adjust the sliders so that a wider range of the color is selected, to change the color just move the Hue slider to change the color, if you want to make the car white move the lightness all the way to the right, if you want to make it black move it all the way to the left. Now if you have any other color changes that are not on the car you can erase them with the eraser tool.