applestar wrote:What are the names of the varieties you are growing?
Tomato plants have different kinds of leaves and this one simply may have different leaf type than others. The one in th picture looks a bit rugose to me.
As stated above a little purple in the leaves is normal for seedlings, and nothing to worry about. Some varieties have intentionally purplish foliage, too.
Thanks everyone! I'm glad I can relax about the color. These things are my children right now lol! The pictured one is a yoder's german yellow- https://www.rareseeds.com/yoders-german-yellow-tomato/
I am also growing the tommy toe cherry variety and sioux. The tommy toe seems to be growing the best but I think it just germinated a little bit sooner than the other two. Sioux germinated last so it looks small in comparison.