Set Color For Button and Save Material Design options:
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1️⃣ Don’t set background color for button, because It’ll show solid and without shadow
2️⃣ Add this style to style.xml to your app theme :
3️⃣ <style name="AppTheme.LoginButton" parent="AppTheme">
<item name="colorButtonNormal">#ACACAC </item>
</style>
Or reference to your color.xml file like : @color/colorAccent
4️⃣ Add this attribute to your Button :
android:theme="@style/AppTheme.LoginButton"