Cinematic color grading is one way you can help your images be consistent, or add some drama to an image that needs a little more. Color grading can also help sell the emotion of the image.
Here are some good Color Grading tutorials for you to check out.
https://www.youtube.com/watch?v=CvopX_R-6nI
https://www.youtube.com/watch?v=fSyXc2jdLPo
https://www.youtube.com/watch?v=HViAvMjGInM