Pronunciation: [blˈakɡɹa͡ʊnd] (IPA)
Correct spelling for the English word "blackground" is [blˈakɡɹa͡ʊnd], [blˈakɡɹaʊnd], [b_l_ˈa_k_ɡ_ɹ_aʊ_n_d] (IPA phonetic alphabet).