black because magenta is a primary pigment, and brown is not a primary neither a secondary pigment just a possible combination. Ans combining a primary color with a not primary o secundary color makes BLACK
Brown
Combining green and magenta will produce a dark purple color.
Probably something VERY close to brown.
Purple
Aubergine.
purple
Magenta and yellow make RED Color
Magenta and yellow make RED Color
Brown
it depends on what shade it is magenta is sorta a red but then again its sorta a brown so red and brown are moth natural so magenta is so yes
Brown
Combining green and magenta will produce a dark purple color.
Probably something VERY close to brown.
another color
Purple
Crimson.
Aubergine.
purple