android - Widget.AppCompat.Button colorButtonNormal shows gray -

i have values:styles.xml with:

<style name="apptheme.button" parent="base.widget.appcompat.button">     <item name="colorbuttonnormal">@color/my_color</item>     <item name="android:textcolor">@android:color/white</item> </style> 

and values-v21:styles.xml with:

<style name="apptheme.button" parent="base.widget.appcompat.button">       <item name="android:colorbuttonnormal">@color/my_color</item>       <item name="android:textcolor">@android:color/white</item> </style> 

and app style with

<style name="apptheme" parent="theme.appcompat.light.noactionbar">       <item name="android:buttonstyle">@style/apptheme.button</item> </style> 

but colors appears grey instead of @color/my_color

to customize 1 button set android:theme="@style/apptheme.button" button.

<button     ......     android:theme="@style/apptheme.button"     ......     /> 

define style did in question

<style name="apptheme.button" parent="base.widget.appcompat.button">     ........     <item name="colorbuttonnormal">@color/my_color</item>     ........ </style> 

[edit]

see github demo here