How do I get the cell to remember it has changed colour in devexpress gridview?

if (e.Column.Name == colProduct.Name) // Gets the column
{
	if (View.GetRowCellValue(e.RowHandle, colProduct).ToString() != "") // Double checks the cell isn't blank
	{
		string SupplierProduct = View.GetRowCellValue(e.RowHandle, colProduct).ToString(); // Get the cell

		if (!string.IsNullOrWhiteSpace(SupplierProduct))
		{
			e.Appearance.BackColor = Color.Crimson; // Changes erroring cell to red                                
			e.Appearance.ForeColor = Color.White; // Changes text colour to white                            

			View.OptionsBehavior.ReadOnly = false; // If there's an error the whole GridView is editable
			View.OptionsBehavior.Editable = true;

			SupplierProductNotFound = false;    // Reset to default                            
		}
	}
}

e.Handled = true;