In the post-production, process coloring is done through color correction or color grading but color correction and color grading are actually different.
Color correction refers to the process where each clip of the footage is changed to match the appearance quality. Basically, to balance the colors, to make whites look white, blacks appear black and make sure everything is equal. The goal is to match the video footage to a standard that accurately depicts how the human eye will view it.
An example of the day is an example of this when you are shooting outside. During the day, the quality of the sun is going to change and some of the shots in your video will not match. This is why color correction is important because it will show your video the way it was shot all at once.
Color correction is only the first pass in a color workflow. This should be seen first by a colourist before proceeding to color grading.
Color correction takes you one step further than color correction Color color grading enhances your story by manipulating colors to create a new tone or mood or to give a specific look to the story. According to Studiobinder.com, "color can often affect us sensitively, emotionally and even physically without making us aware." "Color grading can make a serious difference in the footage.
Here are some great examples of professional color grades from Studio Binder:
In the first example, from Black Hawk Down, the blue is much more saturated, and the brightness is turned down, with the highlights lowered as well. The effect is a great look for sci-fi footage.
In the next example, below, is a landscape shot which also comes from a Ridley Scott film, The Martian.
You’ll notice immediately how much darker the sand in the ungraded clip looks, and, obviously, the amount of saturation in the sky. It looks like, well, Mars.
Non-graded vs. graded in The Martian.
The process of color correction is to make the footage look exactly like the things in the human eye. Color Grading Where you have created the true aesthetics of your video, proper color grading helps to convey a visual tone or mood.
To summarize, check out this 30-second video that quickly explains the differences between color correction and color grading.