Not seen this format before, but it could be that b, r, o and g refer to black filled cells, red filled cells, cells that are empty and green filled cells, in other words a colour hanjie. Being optimistic, this could then describe the solved grid, rather than simply being the clues (as would be the case if 'o' were just a fourth colour - say orange). If the former is right, then the numbers correspond to how many cells are to be filled in each colour, so '3b' means three black cells and so on.
That would leave 273 as the total number of cells in the puzzle which is a bit of an awkward number in terms of width and height to get the dimensions.
You can visualise the four plausible options at:http://www.hanjie.co.uk/view.html
... do any of those ring a bell? Only the top option looks vaguely plausible and might spell out a word, but not sure what.
Of course this guess as to how to interpret the code could be completely wrong, in which case all the above is nonsense. if 'o' is actually 'orange' not a 0 and these are just the start clues for the puzzle rather than a description of the solved grid then things would get tricky