You can not use alfa in primary color. The primary color has to be opaque.
Change:
<item name="colorPrimaryDark">#4DFF9800</item>
<item name="colorPrimary">#4D607D8B</item>
To
<item name="colorPrimaryDark">#FF9800</item>
<item name="colorPrimary">#607D8B</item>
for api 21 in res/values-v21/style.xml
file