Not working tabs-dark in <ion-tabs class="tabs-dark tabs-top">

ionic-v1
1

Hi! try to apply dark style (dark bg and white text) to tabs and got only this:
http://data3.floomby.com/files/share/29_12_2014/11/BGVUPUM7j0SDZBEt1NhoWA.jpg

Code:

 <ion-tabs class="tabs-dark tabs-top">