RED STEM oh my!!!

I have 4 plants growing from bagseed. Same soil, same water, same light source (fluorescent). They are all very healthy but one has a dark red stem while the others are green. Is this a problem? Believe it or not, the one with the stem is growing slightly faster than the others, so I don't know if it is bad or good.

no worries its fine , most plants start off with red stems , or get red stems eventually , nothin you need to worry about.