VERY CUTE!!!
Really depends with colours. Some are quite colourful at 3 months, others are late developers and may not develop colour till 4-5 months.
Simba (my BB Ambilobe x Nosey Be):
about 3 months (a few green speckles on his cheeks):
about 4-5 months:
6 months i think:
A few more of different stages as he grew:
real green coming through: