Conditional formatting in pivot

[nika_garden]

Dear!
please help me to apply conditional formatting in pivot table (attached file).

Creating pivot table, i have weeknumbers in columns and products in rows. As values in pivot table are quantities of sold products.
but there is one more parametr, source of sales (offline sales, online sales or sales with discount), and it is not included in pivot table rows or columns.

So i need to format values in pivot table, based on the condition:
if value in column A "Source" is online, then color value cell in pivot table in red,
if value in column A "Source" is offline, then color the cell in green,
if value in column A "Source" is sale, then color the cell in black.

I really appreciate your replies and hints!
Thanks!