Sometimes the straw is a slightly different shade. So does not 100% match as the same colour.  Personally I think it still looks great 😊 🌈 Lids can look a shade different also, but again I feel it doesn’t detract from the cup! 
The cups can have sl speck or white marks on - see pic of red for example. Doesn’t change function of cup at all. 
It’s difficult to get totally accurate colours in pictures. I’d say the multi cup pictures in rows, rather than a circle is the best colour match looking.
Wt of cup/lid/straw 70g