Here are a couple different videos that help you with some basics on color correcting in Adobe Premiere.
In the first video, from the Tech Infusion channel, you can get a nice introduction to color correction. Note that color correction is different from color grading and this video focuses on the color correction, which should be done before any color grading of your video. (Not sure the difference between color correction and color grading, they do talk about the difference in the video.)
In this second video, Motion Array gives you another look at color correcting in the program.