Index: lldb/include/lldb/Interpreter/CommandReturnObject.h
===================================================================
--- lldb/include/lldb/Interpreter/CommandReturnObject.h
+++ lldb/include/lldb/Interpreter/CommandReturnObject.h
@@ -16,6 +16,7 @@
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/FormatVariadic.h"
+#include "llvm/Support/WithColor.h"
 
 #include <memory>
 
@@ -23,7 +24,7 @@
 
 class CommandReturnObject {
 public:
-  CommandReturnObject();
+  CommandReturnObject(bool colors = false);
 
   ~CommandReturnObject();
 
Index: lldb/include/lldb/Utility/Stream.h
===================================================================
--- lldb/include/lldb/Utility/Stream.h
+++ lldb/include/lldb/Utility/Stream.h
@@ -56,12 +56,13 @@
   ///
   /// Construct with dump flags \a flags and the default address size. \a
   /// flags can be any of the above enumeration logical OR'ed together.
-  Stream(uint32_t flags, uint32_t addr_size, lldb::ByteOrder byte_order);
+  Stream(uint32_t flags, uint32_t addr_size, lldb::ByteOrder byte_order,
+         bool colors = false);
 
   /// Construct a default Stream, not binary, host byte order and host addr
   /// size.
   ///
-  Stream();
+  Stream(bool colors = false);
 
   // FIXME: Streams should not be copyable.
   Stream(const Stream &other) : m_forwarder(*this) { (*this) = other; }
@@ -398,13 +399,17 @@
       m_target.Write(Ptr, Size);
     }
 
+    bool has_colors() const override { return true; }
+
     uint64_t current_pos() const override {
       return m_target.GetWrittenBytes();
     }
 
   public:
-    RawOstreamForward(Stream &target)
-        : llvm::raw_ostream(/*unbuffered*/ true), m_target(target) {}
+    RawOstreamForward(Stream &target, bool colors = false)
+        : llvm::raw_ostream(/*unbuffered*/ true), m_target(target) {
+      enable_colors(colors);
+    }
   };
   RawOstreamForward m_forwarder;
 };
Index: lldb/include/lldb/Utility/StreamTee.h
===================================================================
--- lldb/include/lldb/Utility/StreamTee.h
+++ lldb/include/lldb/Utility/StreamTee.h
@@ -19,7 +19,8 @@
 
 class StreamTee : public Stream {
 public:
-  StreamTee() : Stream(), m_streams_mutex(), m_streams() {}
+  StreamTee(bool colors = false)
+      : Stream(colors), m_streams_mutex(), m_streams() {}
 
   StreamTee(lldb::StreamSP &stream_sp)
       : Stream(), m_streams_mutex(), m_streams() {
Index: lldb/source/Interpreter/CommandInterpreter.cpp
===================================================================
--- lldb/source/Interpreter/CommandInterpreter.cpp
+++ lldb/source/Interpreter/CommandInterpreter.cpp
@@ -209,7 +209,7 @@
   static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
-  CommandReturnObject result;
+  CommandReturnObject result(m_debugger.GetUseColor());
 
   LoadCommandDictionary();
 
@@ -2792,7 +2792,7 @@
 
   StartHandlingCommand();
 
-  lldb_private::CommandReturnObject result;
+  lldb_private::CommandReturnObject result(m_debugger.GetUseColor());
   HandleCommand(line.c_str(), eLazyBoolCalculate, result);
 
   // Now emit the command output text from the command we just executed
Index: lldb/source/Interpreter/CommandReturnObject.cpp
===================================================================
--- lldb/source/Interpreter/CommandReturnObject.cpp
+++ lldb/source/Interpreter/CommandReturnObject.cpp
@@ -28,9 +28,10 @@
     strm.EOL();
 }
 
-CommandReturnObject::CommandReturnObject()
-    : m_out_stream(), m_err_stream(), m_status(eReturnStatusStarted),
-      m_did_change_process_state(false), m_interactive(true) {}
+CommandReturnObject::CommandReturnObject(bool colors)
+    : m_out_stream(colors), m_err_stream(colors),
+      m_status(eReturnStatusStarted), m_did_change_process_state(false),
+      m_interactive(true) {}
 
 CommandReturnObject::~CommandReturnObject() {}
 
@@ -45,9 +46,8 @@
 
   const std::string &s = std::string(sstrm.GetString());
   if (!s.empty()) {
-    Stream &error_strm = GetErrorStream();
-    error_strm.PutCString("error: ");
-    DumpStringToStreamWithNewline(error_strm, s);
+    llvm::WithColor::error(GetErrorStream().AsRawOstream());
+    DumpStringToStreamWithNewline(GetErrorStream(), s);
   }
 }
 
@@ -72,7 +72,8 @@
   sstrm.PrintfVarArg(format, args);
   va_end(args);
 
-  GetErrorStream() << "warning: " << sstrm.GetString();
+  llvm::WithColor::warning(GetErrorStream().AsRawOstream())
+      << sstrm.GetString();
 }
 
 void CommandReturnObject::AppendMessage(llvm::StringRef in_string) {
@@ -84,7 +85,8 @@
 void CommandReturnObject::AppendWarning(llvm::StringRef in_string) {
   if (in_string.empty())
     return;
-  GetErrorStream() << "warning: " << in_string << "\n";
+  llvm::WithColor::warning(GetErrorStream().AsRawOstream())
+      << in_string << '\n';
 }
 
 // Similar to AppendWarning, but do not prepend 'warning: ' to message, and
@@ -99,7 +101,7 @@
 void CommandReturnObject::AppendError(llvm::StringRef in_string) {
   if (in_string.empty())
     return;
-  GetErrorStream() << "error: " << in_string << "\n";
+  llvm::WithColor::error(GetErrorStream().AsRawOstream()) << in_string << '\n';
 }
 
 void CommandReturnObject::SetError(const Status &error,
Index: lldb/source/Utility/Stream.cpp
===================================================================
--- lldb/source/Utility/Stream.cpp
+++ lldb/source/Utility/Stream.cpp
@@ -22,13 +22,14 @@
 using namespace lldb;
 using namespace lldb_private;
 
-Stream::Stream(uint32_t flags, uint32_t addr_size, ByteOrder byte_order)
+Stream::Stream(uint32_t flags, uint32_t addr_size, ByteOrder byte_order,
+               bool colors)
     : m_flags(flags), m_addr_size(addr_size), m_byte_order(byte_order),
-      m_indent_level(0), m_forwarder(*this) {}
+      m_indent_level(0), m_forwarder(*this, colors) {}
 
-Stream::Stream()
+Stream::Stream(bool colors)
     : m_flags(0), m_addr_size(4), m_byte_order(endian::InlHostByteOrder()),
-      m_indent_level(0), m_forwarder(*this) {}
+      m_indent_level(0), m_forwarder(*this, colors) {}
 
 // Destructor
 Stream::~Stream() {}