diff --git a/IPython/nbconvert/filters/ansi.py b/IPython/nbconvert/filters/ansi.py
index 83fe596..c02156a 100644
--- a/IPython/nbconvert/filters/ansi.py
+++ b/IPython/nbconvert/filters/ansi.py
@@ -121,28 +121,30 @@ def single_ansi2latex(code):
     """
     components = code.split(';')
     if len(components) > 1:
-        style = components[0][-1]
+        # Style is digits after '['
+        style = int(components[0].split('[')[-1])
         color = components[1][:-1]
     else:
-        style = '0'
+        style = 0
         color = components[0][-3:-1]
         
     # If the style is not normal (0), bold (1) or blinking (5) then treat it as normal
-    if style not in '015':
-        style = '0'
+    if style not in [0, 1, 5]:
+        style = 0
 
     for name, tcode in coloransi.color_templates:
         tstyle, tcolor = tcode.split(';')
+        tstyle = int(tstyle)
         if tstyle == style and tcolor == color:
             break
     else:
         return '', 0
 
-    if style == '5':
+    if style == 5:
         name = name[5:]                             # BlinkRed -> Red, etc
     name = name.lower()
 
-    if style in '15':
+    if style in [1, 5]:
         return r'\textbf{\color{'+name+'}', 1
     else:
         return r'{\color{'+name+'}', 1
@@ -173,5 +175,3 @@ def ansi2latex(text):
     if openbrack: 
         outstring += '}'*openbrack
     return outstring.strip()
-
-
diff --git a/IPython/nbconvert/filters/tests/test_ansi.py b/IPython/nbconvert/filters/tests/test_ansi.py
index 29eddad..5c448e6 100644
--- a/IPython/nbconvert/filters/tests/test_ansi.py
+++ b/IPython/nbconvert/filters/tests/test_ansi.py
@@ -76,7 +76,9 @@ class TestAnsi(TestsBase):
             'hel%slo' % TermColors.Green : r'hel{\color{green}lo}',
             'hello' : 'hello',
             u'hello\x1b[34mthere\x1b[mworld' : u'hello{\\color{blue}there}world',
-            u'hello\x1b[mthere': u'hellothere'
+            u'hello\x1b[mthere': u'hellothere',
+            u'hello\x1b[01;34mthere' : u"hello\\textbf{\\color{lightblue}there}",
+            u'hello\x1b[001;34mthere' : u"hello\\textbf{\\color{lightblue}there}"
             }
 
         for inval, outval in correct_outputs.items():