If you've studied art, you might have run across the idea of defining colors in terms of their hue, their saturation (or intensity), and their brightness. And if you've never heard of this color model, you might want to stop off at the sidebar on this page, "Color Me Impressed," and spend some time getting used to it.
Working with the Components of Color
We've already worked with brightness; the controls for that aspect of color are located in the Lighting Fixes section. So here, we're able to modify a picture's overall saturation and hue. Essentially, you increase saturation to improve faded colors, and you change the hue setting to fix a color cast.
The Color Fixes also include two specialized variations on the Hue slider: Temperature and Tint. Dragging the Temperature slider makes the image look warmer (more red) or cooler (more blue). When you have the color temperature where you want it, you can use the Tint slider to fine-tune the image's color.
Let's try these tools on a picture that can definitely use some help.