You are spot on.

Fe3+ salt solutions generally have brownish/yellowish colour whilst Fe2+ salt
solutions generally have greenish colour. As such, Iron(III) sulphate has brown
colour whilst Iron (II) sulphate has green colour.

Note:
Do not confuse this with the Precipitate that Fe2+ and Fe3+ salt solutions that
react with Sodium Hydroxide (as in the Qualitative Anaysis Test for Cations).
In such tests, upon reaction with Sodium Hydroxide, green ppt is observed due
to formation of Iron (II) Hydroxide and Yellowish brown ppt is observed for
formation of Iron (III) Hydroxides. You can memorise the similarity thou, since
only Fe2+ and Fe3+ has such distinct colors.

Cheers
Sean