Good Morning,
It will be interesting to let Stantard users the choice of the card.
2 or 3 cards different colours will be great.
I know Premium and Metal Users can enjoy different cards but they are in Metal Or Gold and Silver for Premium.
Standard users should have the choice of the colour for 2 cards.
Have a good day.
I’ve yet to see a reason to justify the provision of additional colours.
And after months 
still cannot provide all colours to Metal users. Silver and Space grey are still not available.
They could allow Standard users to buy the Premium cards at a higher price, I just do not see that as a wise move, nor is it justified.
It would, however, be nice to have the standard card with better security features. I do strongly believe that security is standard and not a ‘feature’. I.e. print PAN on the back or not at all.