If you want to do color correction in post you need to change your picture style. There are 3 main picture styles 1. the build in picture style Standard 2. the picture style Marvels 3. the picture style Cinestyle.
I think Standard is good if you don't want to do much in post production. Marvels is right in-between, it gives you more control in post but not too much. Cinestyle gives you the most control in post but takes more time, that's why I prefer Marvels because its a good compromise between the two.
Here you can see how to set you're picture style to standard: HDSLR 101
Here you can see how to set-up you're canon dslr: Shane Hurlbuts HDSLR 101
Here you can see a good comparison:
Please leave a comment let me know what you think about these picture styles.