ChartColorSettings

 using cAlgo.API;
 namespace cAlgo
 {
     // This indicator allows you to change chart colors via chart controls
     [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
     public class ChartColorSettingsSample : Indicator
     {
         private TextBox _askPriceLineColorTextBox;
         private TextBox _bidPriceLineColorTextBox;
         private TextBox _backgroundColorTextBox;
         protected override void Initialize()
         {
             var grid = new Grid(10, 2)
             {
                 BackgroundColor = Color.Gold,
                 Opacity = 0.6,
                 HorizontalAlignment = HorizontalAlignment.Left,
                 VerticalAlignment = VerticalAlignment.Bottom
             };
             var style = new Style();
             style.Set(ControlProperty.Margin, 5);
             style.Set(ControlProperty.FontWeight, FontWeight.ExtraBold);
             style.Set(ControlProperty.ForegroundColor, Color.Red);
             style.Set(ControlProperty.MinWidth, 100);
             grid.AddChild(new TextBlock
             {
                 Text = "Ask Price Line Color",
                 Style = style
             }, 0, 0);
             _askPriceLineColorTextBox = new TextBox
             {
                 Text = Chart.ColorSettings.AskPriceLineColor.ToString(),
                 Style = style
             };
             grid.AddChild(_askPriceLineColorTextBox, 0, 1);
             grid.AddChild(new TextBlock
             {
                 Text = "Bid Price Line Color",
                 Style = style
             }, 1, 0);
             _bidPriceLineColorTextBox = new TextBox
             {
                 Text = Chart.ColorSettings.BidPriceLineColor.ToString(),
                 Style = style
             };
             grid.AddChild(_bidPriceLineColorTextBox, 1, 1);
             grid.AddChild(new TextBlock
             {
                 Text = "Background Color",
                 Style = style
             }, 2, 0);
             _backgroundColorTextBox = new TextBox
             {
                 Text = Chart.ColorSettings.BackgroundColor.ToString(),
                 Style = style
             };
             grid.AddChild(_backgroundColorTextBox, 2, 1);
             var changeButton = new Button
             {
                 Text = "Change",
                 Style = style
             };
             changeButton.Click += ChangeButton_Click;
             grid.AddChild(changeButton, 9, 0);
             Chart.AddControl(grid);
         }
         private void ChangeButton_Click(ButtonClickEventArgs obj)
         {
             Chart.ColorSettings.AskPriceLineColor = GetColor(_askPriceLineColorTextBox.Text);
             Chart.ColorSettings.BidPriceLineColor = GetColor(_bidPriceLineColorTextBox.Text);
             Chart.ColorSettings.BackgroundColor = GetColor(_backgroundColorTextBox.Text);
         }
         private Color GetColor(string colorString, int alpha = 255)
         {
             var color = colorString[0] == '#' ? Color.FromHex(colorString) : Color.FromName(colorString);
             return Color.FromArgb(alpha, color);
         }
         public override void Calculate(int index)
         {
         }
     }
 }

 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():
     def get_text_block(self, text):
         textBlock = TextBlock()
         textBlock.Text = text
         textBlock.Style = self.style
         return textBlock
     def get_color(self, colorString, alpha = 255):
         color = Color.FromHex(colorString) if colorString[0] == '#' else Color.FromName(colorString)
         return Color.FromArgb(alpha, color)
     def on_change_button_clicked(self, args):
         api.Chart.ColorSettings.AskPriceLineColor = self.get_color(self.askPriceLineColorTextBox.Text)
         api.Chart.ColorSettings.BidPriceLineColor = self.get_color(self.bidPriceLineColorTextBox.Text)
         api.Chart.ColorSettings.BackgroundColor = self.get_color(self.backgroundColorTextBox.Text)
     def initialize(self):
         grid = Grid(10, 2)
         grid.BackgroundColor = Color.Gold
         grid.Opacity = 0.6
         grid.HorizontalAlignment = HorizontalAlignment.Left
         grid.VerticalAlignment = VerticalAlignment.Bottom
         self.style = Style()
         self.style.Set(ControlProperty.Margin, 5)
         self.style.Set(ControlProperty.FontWeight, FontWeight.ExtraBold)
         self.style.Set(ControlProperty.ForegroundColor, Color.Red)
         self.style.Set(ControlProperty.MinWidth, 100)
         grid.AddChild(self.get_text_block("Ask Price Line Color"), 0, 0)
         self.askPriceLineColorTextBox = self.get_text_block(str(api.Chart.ColorSettings.AskPriceLineColor))
         grid.AddChild(self.askPriceLineColorTextBox, 0, 1)
         grid.AddChild(self.get_text_block("Bid Price Line Color"), 1, 0)
         self.bidPriceLineColorTextBox = self.get_text_block(str(api.Chart.ColorSettings.BidPriceLineColor))
         grid.AddChild(self.bidPriceLineColorTextBox, 1, 1)
         grid.AddChild(self.get_text_block("Background Color"), 2, 0)
         self.backgroundColorTextBox = self.get_text_block(str(api.Chart.ColorSettings.BackgroundColor))
         grid.AddChild(self.backgroundColorTextBox, 2, 1)
         changeButton = Button()
         changeButton.Text = "Change"
         changeButton.Style = self.style
         changeButton.Click += self.on_change_button_clicked
         grid.AddChild(changeButton, 9, 0)
         api.Chart.AddControl(grid)