Convert TSV to JSON

gistfile1.txt

In TextWrangler, open the TSV file and strip off the first line (header row). 
Add a final Return character at the end of the file if there isn't one already.
Open the Search and Replace dialog and make sure the "GREP" checkbox is ticked. 
Enter the following in the Search field:

(.+?)\t(.+?)\t(.+)\r

Enter the following in the Replace field:

["\1", "\2", "\3"], 

(note there is a trailing space after the terminal comma)

Click Replace All. You should end up with this:

["PANTONE 100 C", "1016", "13"], ["PANTONE 101 C", "1016", "4.2"], 
["PANTONE 102 C", "1021", "19.3"], ["PANTONE 103 C", "1012", "13.6"], 
... + lots more, all on one line (wrapped here for clarity) ...

If there is a comma after the last ] character, remove it.

Add a trailing ] at the end of the file, and scroll back to the beginning and add a [. 

You should end up with an array of arrays: [[a, b, c], [d, e, f], ...etc... [x, y, z]]

Save this file as colors.js