Text color if another cell is empty

Question

C#, visual studio 2015.

ID	PaymentDate	Amount	CIBTANO
1	10 Feb 2017	500	459
2	15 Mar 2017	300
3	20 Mar 2017	450	654
4	07 Apr 2017	700

 

When I shall press the Submit button, CIBTANO will be empty, then I need the text color of Amount is red. When I shall press the Edit button with input the CIBTANO then the text color of Amount will black. This will only in datagridview.

Please help me by providing sample code or example.