As a manager who interviews young people looking for jobs, here is what I would recommend:
Get a dark blue suit. Two white shirts and two different colored ties. You will also need black dress shoes and dark socks. Choose a suit of which the coat can be worn separately with grey or khaki pants. This will give you flexibility to have several “looks”.
However, you are not expected to be totally GQ. Everyone understands that you are a poor college student. Your personality, curiosity, willingness to work and friendly attitude are by far the most important things you wear to the meeting.
Even though very few organizations require suits for work. Everyone expects you to conform to the ritual during your interviews. They also expect you to bring a pen and something to write on. Do your homework on the employer and have a list of questions to ask about the job. I know this sounds elementary, but 80% of the grads I see are so busy talking about their weekend at the beach, that they show no interest in the job.
Good luck in your interviews.