Mean dark green?

Okay, first good indoor grow for me. (not first try however)
These things look good to me in the cab.
However, when I take them out the green is so dark, it's near black! (well, sorta)
I've never had a O.S. grow this dark ever.
Looks healthy, good leaves, about 3 weeks into flower.

Is very dark green good or am I messing up somehow?
These are "Quality Bag Seed(?)" donated to me in the form of really stretched mothers that I planted outdoors and then cloned for inside the cab.

I'm wondering if dark means, needs more light, or something?????
Maybe it's my first really good grow?
I'm confused on this.
Thanks,
Canon

thank you all.

dark green usually mean it is heavy on nitrogen, and if it is flowering it doesn't need as much of it as compared to the veg stage. If the plant looks healthy, then it may not be a bad thing, but you might want to adjust your nutes to a flower schedule. Do you happen to have a pic?

Typically, the more vibrant and dark the leaf is, the healthier it is.

~ooli~

Sounds like an overabundance of N (to my friend). He says to be careful you don't end up with spindly, weak growth that accompanies N over-fertilization. He also has a caregiver license and is legal anyway