Different colour for duplicate and triple entries?

Hello,

Could anyone help me with this, I need to have a different colour for duplicate and a different colour for triplets?

Thanks in advance,
I have attached a sample

You will need one rule per color:

Rule 1
Highlight C2:C14 > Conditional Formatting > New Rule > Use a formula
=COUNTIF(C:C,C2)=2
Format: Fill Yellow > OK > OK

Rule 2
Highlight C2:C14 > Conditional Formatting > New Rule > Use a formula
=COUNTIF(C:C,C2)=3
Format: Fill Green > OK > OK