Line under the Input field doesn't change color when color theme changes

When changing the color theme for md-field local in a components style tag the color of the line under the input field keeps the color of global color Theme. The color of the lable does change .

I'm using vue-material with electron
OS: windows 10
electron version: 1.7.5
node version: 8.9.1
npm version: 5.5.1
vue-material version: 1.0.0-beta-7

