What is the nickname for my bus?

Morning Arrival Buses Afternoon Dismissal Buses
3864 = GOLD 6817 = GOLD
3820 = BROWN 6930 = BROWN
1825 = ROSE 6885 = PURPLE
1999 = ORANGE 1999 = ORANGE
3996 = BLACK 1802 = BLACK
5864 = BLUE 5864 = BLUE
5997 = RED 5997 = RED
6106 = A 6127 = A
6103 = T 6103 = T
6121 = L 6121 = L
6125 = MAGENTA 6981 = MAGENTA
6416 = RAINBOW 6106 = RAINBOW
6995 = O 6995 = O
6996 = PINK 6996 = PINK
  1809 = TEAL