In a candle flame, what is the colour of : innermost zone ?

In a candle flame, what is the colour of : middle zone ?

In a candle flame, what is the colour of : outer zone ?

What is the colour of the flame test for sodium?

Innermost zone is the:

In order to understand the structure of a flame, light a wax candle and watch its flame. Carefully note the different coloured zones in the flame. Starting from the base of the flame, a flame has three zones. Check the below figure and try to answer the following question The diagram shows different zones of candle flames. Label 2, 3, 4 also give the colour of the zone.