Color the prompt

To visually distinguish lines of input from (often huge) blocks of output, I've added the standard IPython input prompt colors to the `ipdb> `/`ipydb> ` prompt string.

IPython/core/debugger.py

@@ -210,8 +210,6 b' class Pdb(OldPdb):'
         else:
             OldPdb.__init__(self,completekey,stdin,stdout)
 
-        self.prompt = prompt # The default prompt is '(Pdb)'
-
         # IPython changes...
         self.is_pydb = has_pydb
 
@@ -253,12 +251,15 b' class Pdb(OldPdb):'
         C = coloransi.TermColors
         cst = self.color_scheme_table
 
+        cst['NoColor'].colors.prompt = C.NoColor
         cst['NoColor'].colors.breakpoint_enabled = C.NoColor
         cst['NoColor'].colors.breakpoint_disabled = C.NoColor
 
+        cst['Linux'].colors.prompt = C.Green
         cst['Linux'].colors.breakpoint_enabled = C.LightRed
         cst['Linux'].colors.breakpoint_disabled = C.Red
 
+        cst['LightBG'].colors.prompt = C.Blue
         cst['LightBG'].colors.breakpoint_enabled = C.LightRed
         cst['LightBG'].colors.breakpoint_disabled = C.Red
 
@@ -268,6 +269,10 b' class Pdb(OldPdb):'
         # debugging.
         self.parser = PyColorize.Parser()
 
+        # Set the prompt
+        Colors = cst.active_colors
+        self.prompt = u'%s%s' % (Colors.prompt, prompt) # The default prompt is '(Pdb)'
+
     def set_colors(self, scheme):
         """Shorthand access to the color table scheme selector method."""
         self.color_scheme_table.set_active_scheme(scheme)