Checkig color of an image???

[swetha.b]

Hi all,
This is an intresting challenge I got but I am unable to make a move.

Please have a look at my attached image.
My requirement is this : If I have to select any of the records (listed in the image with checkbox each ) between any specific time period - example from 1/15/2010 to 1/30/2010 - I should only select a record which has the color green (This is the color set to a vacant record - can be seen in the legend below : Green implies vacant) with in the time period specified.
so while automating how do I check that which record has the same color as that of the legand 'vacant'??

Do I have to use a bitmap checkpoint ?? but that didnt wrk for me either.

any way to go ??

Please help.

Thanks
Swetha