GridColors.aspx

	<px:PXGrid ID="grid" runat="server" Height="350px" Width="100%" AdjustPageSize="Auto"
		SkinID="Primary" AllowPaging="True" AllowSearch="True" FastFilterFields="AccountCD,Description" SyncPosition="True" 
		OnRowDataBound="grid_RowDataBound">
		<Levels>
			<px:PXGridLevel DataMember="AccountRecords">
				<Columns>
				</Columns>
			</px:PXGridLevel>
		</Levels>
	</px:PXGrid>

GridColors.cs

using System;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Page_GL202500 : PX.Web.UI.PXPage
{
    protected void Page_Load(object sender, EventArgs e)
    {
        RegisterStyle("MyCssRed", "Red", null, false);
    }
 
    private void RegisterStyle(string name, string backColor, string foreColor, bool bold)
    {
        Style style = new Style();
        if (!string.IsNullOrEmpty(backColor)) style.BackColor = Color.FromName(backColor);
		if (!string.IsNullOrEmpty(foreColor)) style.ForeColor = Color.FromName(foreColor);
		style.Font.Bold = bold;

        this.Page.Header.StyleSheet.CreateStyleRule(style, this, "." + name);
    }
 
    protected void grid_RowDataBound(object sender, PX.Web.UI.PXGridRowEventArgs e)
    {
		Object value = e.Row.Cells["Active"].Value;
		if (value != null && ((Boolean)value) == false)
			e.Row.Style.CssClass = "MyCssRed";
    }
}