Eh. Please use lock-alpha. It makes things look nice.
You MAY:
-Color for fun.
-Create a character for yourself.
-Adopt out colored versions (NOT FOR PROFIT/NOT IN ADOPTABLE OEKAKI)
-Add shading/edit the lines slightly (As long as it's recognizable)
You MAY NOT:
-Erase or otherwise hide my signature.
-Sell any version of these lines for profit, real or virtual.
-Post on the Editable or Adoptable Oekaki - Please use the original, unless you wish to re-use your shading.
-Erase and start over.
-Steal.
-Take these lines off CS, unless you're putting a character you made on your personal website.