add function to create SKColor using int's.

DeathSocket/ColourServices.fs

@@ -2,6 +2,8 @@
 
     open System.Drawing
     open DeathSocket.Domain
+    open System
+    open SkiaSharp
 
     let makeBrushFromRGBASpec (spec: RGBASpec) =
         let a = int spec.alpha
@@ -15,3 +17,8 @@
         let colour = Color.FromArgb (a, r, g, b)
         new SolidBrush (colour)
 
+    let makeSkiaColour r g b =
+        let red = BitConverter.GetBytes (int r)
+        let green = BitConverter.GetBytes (int g)
+        let blue = BitConverter.GetBytes (int b)
+        new SKColor (red.[0], green.[0], blue.[0])

DeathSocket/ImageServices.fs

@@ -67,7 +67,8 @@
         use stroke = new SKPaint ()
         stroke.Style <- SKPaintStyle.Stroke
         stroke.StrokeWidth <- float32 3
-        stroke.Color <- SKColors.BlueViolet
+        //stroke.Color <- SKColors.BlueViolet
+        stroke.Color <- makeSkiaColour 123 123 123
         // Note about generating colours in Skia Sharp.
         //stroke.Color <- new SKColor (byte 1000, byte 5111, byte 4225, byte 255)
         use imageFill = new SKPaint ()