Is Hexadecimal a swear word?

So 1 hour after my bann in Miiverse from nintendo… My girlfriend made a post about an idem on a frame in Minecraft being a RAINBOW color… Some random guy asked how did she do that then i explained it had to do with HEXADECIMAL NUMBERS AFTER A SECTION SYMBOL then got an instant bann… So now i'm wondering… Is hexadecimal even a swear word…