Kurogokegumo.
Kuroi ie/uchi.
太陽の黒。is the kanji you would use. (taiyo no kuro) the literal translation is "sun of black"
黒い血 (kuroi chi)
Caffe is the Italian equivalent of 'cafe'. It may be translated into English as the drink 'coffee' or as the meeting place where coffee may be ordered and drunk, 'coffee house'. The phrase 'black coffee' is translated as 'caffe nero'.
The phrase 'black fire' would be translated as 黒い火 (kuroi hi) in Japanese.
Kuroneko.
kuro to shiro
Kuro Kaze
Kuroi sasori.
Kurotsuki
Kuroi Ame
kuroi inu
Kurogokegumo.
Kuroi ie/uchi.
'Black thunder' would be 黒い雷 (kuroi kaminari) in Japanese.
There are no plurals in Japanese. 黒い竜 = kuroi ryuu, or lit. black dragon. Hope this helps~