What does Green Based mean

Black Magic Solution is green based so what does this mean for you, and how does it

compare to other bases?

The idea behind green based products is that on the colour wheel Green is at the
opposite spectrum of Red/ Orange, therefore 
this will help counteract orange tones. 

To ensure a perfect tan, green based doesnt mean you can just apply as many coats as you like and 
the tan will not overdevelop, if you apply too much product onto the skin you will run the risk of the tan
getting Orange, remember you are always best to apply a single coat application for your first tan, then 
work your way up from there to see what your skin type can handle.