Use a different color (skyblue) for project references

src/Chisel/DependencyGraph.cs

@@ -16,8 +16,14 @@ private static Package CreatePackage(LockFileTargetLibrary library)
     {
         var name = library.Name ?? throw new ArgumentException("The library must have a name", nameof(library));
         var version = library.Version?.ToString() ?? throw new ArgumentException("The library must have a version", nameof(library));
+        var type = library.Type switch
+        {
+            "package" => PackageType.Package,
+            "project" => PackageType.Project,
+            _ => PackageType.Unknown,
+        };
         var dependencies = library.Dependencies.Select(e => e.Id).ToList();
-        return new Package(name, version, dependencies);
+        return new Package(name, version, type, dependencies);
     }
 
     public DependencyGraph(HashSet<string> resolvedPackages, string projectAssetsFile, string tfm, string rid, IEnumerable<string> ignores)
@@ -178,6 +184,14 @@ public void Write(TextWriter writer, GraphDirection graphDirection = GraphDirect
             {
                 writer.Write(" [ color = lightcoral ]");
             }
+            else if (package.Type == PackageType.Project)
+            {
+                writer.Write(" [ color = skyblue ]");
+            }
+            else if (package.Type == PackageType.Unknown)
+            {
+                writer.Write(" [ color = khaki ]");
+            }
             writer.WriteLine();
         }
         writer.WriteLine();

src/Chisel/Package.cs

@@ -7,15 +7,17 @@ namespace Chisel;
 [DebuggerDisplay("{Name}/{Version}")]
 internal sealed class Package : IEquatable<Package>
 {
-    public Package(string name, string version, IReadOnlyCollection<string> dependencies)
+    public Package(string name, string version, PackageType type, IReadOnlyCollection<string> dependencies)
     {
         Name = name;
         Version = version;
+        Type = type;
         Dependencies = dependencies;
     }
 
     public string Name { get; }
     public string Version { get; }
+    public PackageType Type { get; }
     public IReadOnlyCollection<string> Dependencies { get; }
 
     public string Id => $"{Name}/{Version}";

src/Chisel/PackageType.cs

@@ -0,0 +1,8 @@
+namespace Chisel;
+
+internal enum PackageType
+{
+    Unknown,
+    Package,
+    Project,
+}

tests/Chisel.Tests/DependencyGraphTest.SqlClientGraph.verified.gv

@@ -10,7 +10,7 @@ digraph
   "Microsoft.Data.SqlClient.SNI.runtime/5.2.0"
   "Microsoft.Data.SqlClient/5.2.0"
   "Microsoft.Identity.Client.Extensions.Msal/4.56.0" [ color = lightcoral ]
-  "Microsoft.Identity.Client/4.56.0"
+  "Microsoft.Identity.Client/4.56.0" [ color = skyblue ]
   "Microsoft.IdentityModel.Abstractions/6.35.0" [ color = lightcoral ]
   "Microsoft.IdentityModel.JsonWebTokens/6.35.0" [ color = lightcoral ]
   "Microsoft.IdentityModel.Logging/6.35.0" [ color = lightcoral ]