If your tomatoes are not turning red, find out the reasons for this common problem and learn effective troubleshooting tips to get tomatoes to ripen.

The colors include red, orange, pink, yellow, and now purple. ... Tomatoes are one of the most popular food plants in the world, and as such, have undergone massive amounts of selective breeding.

Pink tomatoes are similar to red, but have less lycopene in them, hence their lighter color. They have lower acidity, allowing the sugars a little more prominence.