Red
Just as Elphaba's life was full of blue, Nessarose's life was full of red.
Her mother's blood was red as she delivered her and never woke up.
Her lips were naturally colored blood red—perhaps it was a reminder of Mother?
Her father gave her silver shoes, which later became ruby red.
Her wheelchair when she became Governess was red.
Boq's heart was red and beating, until she stole it.
Nessarose's blood was red--and flowing--when Dorothy's house crushed her.
Dorothy stole Nessa's shoes, now stained with her blood…