mdTabs: pagination arrows invisible when using md-primary

[PaulMougel]

Relevant issue: #1464.

As the arrows are using the primary color, when using class="md-primary" for tabs, the pagination arrows become invisible. See for instance this pen, which has 6 tabs: http://codepen.io/PaulMougel/pen/PwRbgQ

[cameronbird6]

Just ran into this issue myself and in addition to the arrows being invisible, I am seeing the following errors being logged in the console:

TypeError: Cannot read property 'tagName' of undefined
at Object.Icon (angular-material.js:5952)
at angular-material.js:5877
at angular.js:13189
at l.$get.l.$eval (angular.js:14401)
at l.$get.l.$digest (angular.js:14217)
at l.$get.l.$apply (angular.js:14506)
at l (angular.js:9659)
at S (angular.js:9849)
at XMLHttpRequest.D.onload (angular.js:9790)

angular.js:11607 TypeError: undefined is not a function
at loadFromIconSet (angular-material.js:5886)
at angular.js:13189
at l.$get.l.$eval (angular.js:14401)
at l.$get.l.$digest (angular.js:14217)
at l.$get.l.$apply (angular.js:14506)
at l (angular.js:9659)
at S (angular.js:9849)
at XMLHttpRequest.D.onload (angular.js:9790)

Hope it helps!