4x ring 2nd gen

1x ring plus 

A= 4.5, B= 2.25, C= 2.25, D= .75 the color is Blue Ridge which is a very dark blue, so I think BLACK will be fine.

(1) RING Battery Doorbell Plus MOD.#5F77E9
(4) RING Video Doorbell (2nd GEN) #5UM5E5