Added # in front of the expected hex colors. (main_spec.rb)

The fake zip code in the source text (039482) is valid as a hex color. I've added # in front of the 3 expected hex colors in main_spec.rb since, when using # in the regex, the fake zip won't be collected along with the colors. Another solution would be to add a 7th digit to the zip code but I think this is cleaner and reinforces the format of hex colors.