If you choose only one color in croc....???

For me, it would probably be one of the following:
Miel Shiny 35 cm Birkin (!)
or
Black or Rouge Vif Shiny 32cm Kelly

If I could have unlimited croc bags (as opposed to the none I have now LOL), I would also want a matte croc 35cm Birkin Cognac with PHW.
 
Matte Black. Its understated and doesn't scream a block away so it can be discreet when you want it to but anyone close enough to you will see its amazing beauty. (I'm currently obsessed with acquiring one so I've spent many many many hours poundering this question)