Nero and Bianco is Italian for black and white. Not too bad.
Terd has the right idea, although Hiss and Hearse made me laugh out loud!
Any more languages for black and white? If you suggest a name out of mythology, a little background please. Like I said, NOT paired is fine!
Oh, btw, I already had a Nag and Nagina, so any Kipling fans , your out of luck!
Mungojerry and Rumpleteaser
Lucifer and Nicotine
Eeeyu and Yuuenn (Bad political pun)
When I was on Maui in 1991, there was a female snake born with two heads; they were named Thelma and Louise.
Noir and Blanc (I think) is French for black and white.
How about Orpheus and Eurydice?
Bush and Cheney? 
Damn, Kat already mentioned my pick for black and white. How about the overused Ebony and Ivory? Or Checkers and Chess?
Hissy Fit and Sir Pent
Vermithrax and Smaug
Forky and Spooner
How about a Seussian homage – Snake One and Snake Two?
Mr & Mrs Snake
And I thought Anna and Kobie were a slam dunk!
German: schwarz and weiss
Dutch: Zwart and wit
Portugese: preto and branco
Norwegian: svart and hvit
Hope that helps…
Hindi - Kala and Safaydh.
Yin and Yang
Cath & Ann (Anode/Anion & Cathode/Cation) genderfy if needed
Blanche and Bituminous (toomy for short)
Proton and Electron
There has to be appropriate black.white pairs in mythology
Brian
I would name them Pancho and Lefty.
I would name them Pancho and Lefty.
Pinky and the Brain?
Terrence and Philip?
Jake and Elwood?
Beecher and Keller?
OK, maybe not the last one…
Basil from A Clockwork Orange,
and Asmodeus for an evil god from one of the many Middle Eastern religions.
Lisk and Trice? (Basilisk and Cockatrice, if you’re the formal sort.)
teeter and totter
Clarance and Mildrid
Ozzie and Harriet