You can try handling the DrawCellButtonBackground event.
private void gridControl1_DrawCellButtonBackground(object sender, GridDrawCellButtonBackgroundEventArgs e)
{
GridCurrentCell cc = this.gridControl1.CurrentCell;
if(cc.RowIndex == 2 && cc.ColIndex == 3)
{
e.Graphics.FillRectangle(Brushes.Red, e.Bounds);
e.Cancel = true;
}
}