Apples and oranges. Bootstrap's default buttons all carry some kind of semantic meaning (primary, warning, info, etc.) while these buttons are purely for their

Apples and oranges. Bootstrap's default buttons all carry some kind of semantic meaning (primary, warning, info, etc.) while these buttons are purely for their visual appeal. The colors within a single Kuler color scheme aren't intended to be used together in this pack, they're just arranged like that so you can see the color schemes. It's more like for when you want a nice looking button and want a wide variety of colors to choose from.