Allow common color string names in edge_color.

Fixes #304

--HG--
extra : convert_revision : svn%3A3ed01bd8-26fb-0310-9e4c-ca1a4053419f/networkx/trunk%401501

1 files changed, 1 insertions, 1 deletions

diff --git a/networkx/drawing/nx_pylab.py b/networkx/drawing/nx_pylab.py
index 43d549ac..d9928583 100644
--- a/networkx/drawing/nx_pylab.py
+++ b/networkx/drawing/nx_pylab.py
@@ -327,7 +327,7 @@ def draw_networkx_edges(G, pos,
         else:
             raise ValueError('edge_color must consist of either color names or numbers')
     else:
-        if len(edge_color)==1:
+        if cb.is_string_like(edge_color) or len(edge_color)==1:
             edge_colors = ( colorConverter.to_rgba(edge_color, alpha), )
         else:
             raise ValueError('edge_color must be a single color or list of exactly m colors where m is the number or edges')