Not sure why those colours were chosen as it would affect those with colour blindness
While red/green colour blindness is by far the most common form, with far fewer people having blue/green issues, it's irrelevant anyway. Choices of colour are only a primary concern when colour is the only differentiation, such as if there was a sign saying below "Go to platform when your service is highlighted green" - obviously not the case here.
Furthermore, almost all colour blind people can see the difference between different colours, so even if they're not sure whether the bluey-green or the greeny-blue is the blue patch, they will still see that all the "Wait here" panels have the same shade as the "Go to platform" panels, so the use of different colour backgrounds still works for those users in highlighting the different panels. Simulators and research partners are widely available to help come up with colours that are differentiable to all but the worst sufferers, and running photos of the screens through such tools shows a good amount of work has been done to do this - even with no colour vision at all the panels appear to be different luminosities so can be identified.
The simple question is "do I need to know that part of the screen is green to be able to understand what it is telling me?" If the answer is yes, then there will be issues with colour-blindness. In this case, it's a pretty clear no.
