Changing the color of Grid field based on value

There are two columns, namely X and Y, in a grid. I need the following functionality:
 

When the value in X is lower than the value in Y, the X field color should change to red. and

When the value in Y is lower than the value in X, the Y field color should change to red.

Example:

For example, if X = 3 and Y = 6, the X field should appear in red.

For example, if X = 8 and Y = 5, the Y field should appear in red.

How to achieve this, I need steps on how and code if possible.

Note: I do not want to highlight the entire row, only the specific field.