As you progress in your experience with photography, one of the things you need to think about is color temperature. You have probably seen the setting on your camera that says: “AWB” this stands for Auto White Balance. Which means that the camera will try to set the color temperature for you. This is fine under some circumstances, but not great if your shooting in the shade or with studio lighting, using a flash, or mixed lighting.
In black and white you don’t have to worry about the color temperature because it doesn’t often make a difference. If your working with color it makes a big difference. If your taking more than just a few photos, having the color balance set correctly will save you a lot of time in Photoshop. One way to get the right color balance is to use a white card in the first image then correct the white balance in photoshop and save the setting. Then apply the setting to the other images that were taken in the same session. I can tell you a way that is better.
Set your camera up, use a white card and expose the first image. Be sure to get the exposure right and just where you want it. Load the first image into Lightroom and choose the develop menu. Select the eye drop tool and set the white balance from the white card in your properly exposed image. See the color temperature on the right side? Write that number down, then set the white balance in your camera to that same number. Then every image you expose under this condition will be exposed with the right setting without having to correct a lot in photoshop.
When your finished with your photo shoot, be sure to set the white balance back to “AWB” so it’s ready to go for your next shoot.
The color temperature in Lightroom shows that you have blues on the left of the slider and more yellow on the right of the slider. Your job is to find the right color temperature that looks most natural for your image. Too much blue and it looks cold and unwelcome, especially photographs of people need to be warmer in tone unless your trying to make them look like a villain.
Learn how to see the color temperature in Lightroom and Photoshop, this will add to your abilities in color photography and will enhance the look of your photographs.