CanvasColour.cs

using System.Drawing;

// Descriptions
Component.Name = "Canvas Colour";
Component.Description = "Changes colour of canvas background and grid";
Component.Params.Input[0].Name = "Enable";
Component.Params.Input[0].NickName = "E";
Component.Params.Input[0].Description = "Toggle to enable/disable custom colour settings";
Component.Params.Input[1].Name = "Background Colour";
Component.Params.Input[1].NickName = "B";
Component.Params.Input[1].Description = "Colour of canvas background";
Component.Params.Input[2].Name = "Grid Colour";
Component.Params.Input[2].NickName = "G";
Component.Params.Input[2].Description = "Colour of Canvas Grid";

// Defaults to white BG with no grid
if(G.IsEmpty) G = Color.FromArgb(0, 0, 0, 0);
if(B.IsEmpty) B = Color.FromArgb(255, 255, 255, 255);


if (E)
{
  Grasshopper.GUI.Canvas.GH_Skin.canvas_grid = G;
  Grasshopper.GUI.Canvas.GH_Skin.canvas_back = B;
  Grasshopper.GUI.Canvas.GH_Skin.canvas_edge = Color.FromArgb(255, 0, 0, 0);
  Grasshopper.GUI.Canvas.GH_Skin.canvas_shade = Color.FromArgb(80, 0, 0, 0);
}
else
{
  // GH DEFAULTS
  Grasshopper.GUI.Canvas.GH_Skin.canvas_grid = Color.FromArgb(30, 0, 0, 0);
  Grasshopper.GUI.Canvas.GH_Skin.canvas_back = Color.FromArgb(255, 212, 208, 200);
  Grasshopper.GUI.Canvas.GH_Skin.canvas_edge = Color.FromArgb(255, 0, 0, 0);
  Grasshopper.GUI.Canvas.GH_Skin.canvas_shade = Color.FromArgb(80, 0, 0, 0);
}