My tomatoes are not ripening to an even red color. What is the reason?

Uneven ripening includes green stripes, streaks, blotches, stars on the bottoms of fruit, yellow or green shoulders, etc. This problem may be caused by high fertility (N), low potassium (K), high temperature (lycopene killed), viruses, or white flies. Be sure to maintain the correct fertilizer amounts. Tissue test to check this.