Insert strings that contain colons into a table

How can I insert multiple strings into a table where the strings contain
colons.  
This case fails:
INSERT INTO wwn (wwn_start,wwn_end) VALUES
('50:06:0B:00:00:C2:86:80','50:06:0B:00:00:C2:86:83');
ERROR:  array value must start with "{" or dimension information at
character 71
LINE 1: ..._start,wwn_end) VALUES ('50:06:0B:00:00:C2:86:80','50:06:0B:...

But this case passes:

INSERT INTO wwn (wwn_start) VALUES ('50:06:0B:00:00:C2:86:80');

Thank you,
Lance



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