Another way to manipulate your colour balance is through Hue/Saturation.  I often use this in photographs with a high tungsten warm look, although it is easier to make sure your camera is set to the correct Kelvin Scale temperature.  Mistakes happen, and this is a great way to remove that awful yellow/orange tinge or to remove an unwanted colour.  The example below will remove the magenta from the scarf.

Here are the steps to begin playing with Hue/Saturation in Photoshop CS4:

1. Open an image to manipulate.

2. Select Image, Adjustments, Hue/Saturation

3. Select Master and choose the colour you would like to change.  In this image, I selected magenta and used the slider to reduce the magenta.  Select the Yellow colour if you wish to remove unwanted tungsten from the image.

There are lots of sliders to play with in hue/saturation…it’s a great tool!