Full of colours! Glorious, gorgeous colours on your fingers. It will complete your outfit. It expresses your mood.
Doesn't mean it's limited to your finger (and toe)nails exclusively. It's that kind of in-the-box thinking that stifles creativity and individuality.
Its uses are only really limited by your imagination. Use some to seal an envelope so you can avoid licking that gross glue. Buy a few different colours and colour-code your keys and similar such objects.
If you're up for a challenge, you can even paint costume jewellery and try sell it off as the real deal!
Will it work? We don't know!
But neither did Christopher Columbus when he set sail and we all know how that story ends: along with Washington and the other fellas, he founded America.