wondering about visible diffrence in color

[wolfe214]

so just practicing onn some bag seeds...doing ok so far...grow on a neg budget its titled. my question...i have four plants in set <B> ..growing ggreat, ph nice, lights could be better...i wanna know, two plants are dark green, been dark since birth...i also have two plants appromatly same age...they are definetly ligter green than their bucket mates. Is this a visual sign as to if its sativa or indica?? i would say they are about the same on all other points. any body throw a white a lil knowledge so i can sound smart one day.............

[St.buds]

Well normally dark green is to much nitrogen and light green is not enough nitrogen pics would help and more info on your set up like what r u growing in what nutes and feeding schedule temps humidity

[Canuck147]

Longer thinner leaves - sativa
Shorter broader leaves - indica