    x_axis = left_chart.GetAxis(vtkAxis.BOTTOM)
    x_axis.GetGridPen().SetColor(colors.GetColor4ub("LightGrey"))
    x_axis.SetTitle('x')
    y_axis = left_chart.GetAxis(vtkAxis.LEFT)
    y_axis.GetGridPen().SetColor(colors.GetColor4ub("LightGrey"))
    y_axis.SetTitle('cos(x)')
    left_chart.GetBackgroundBrush().SetColorF(*colors.GetColor4d('MistyRose'))
    left_chart.GetBackgroundBrush().SetOpacityF(0.4)
    left_chart.SetTitle('Cosine')
--
    x_axis = right_chart.GetAxis(vtkAxis.BOTTOM)
    x_axis.GetGridPen().SetColor(colors.GetColor4ub("LightCyan"))
    x_axis.SetTitle('x')
    y_axis = right_chart.GetAxis(vtkAxis.LEFT)
    y_axis.GetGridPen().SetColor(colors.GetColor4ub("LightCyan"))
    y_axis.SetTitle('sin(x)')
    right_chart.GetBackgroundBrush().SetColorF(*colors.GetColor4d('Thistle'))
    right_chart.GetBackgroundBrush().SetOpacityF(0.4)
    right_chart.SetTitle('Sine')
