Android : How to get an Android phones's IMEI and color via USB

I am planning to write an application for my job. I just need to get IMEI numbers of Android devices when they are connected to my PC. It would be great if it shows the color of the device together. Because I want to recongnize each phones when pluging many at once.

With these IMEI numbers, I am going to print out labels for inventory managing. Now there are many phones comming to my office everyday. I open back covers and write down manually. Later on, I put the data into excel. I think this is a wasting of my much time.

I do not know where I need to start to write this application. I do not know if this is possible or not. Any comments will be welcome. Anyone have tried this kind of job? Thank you.