awtk/demos/assets/default/raw/styles/tab_bottom_compact.xml

<tab_button_group>
  <style name="default" border_color="#a0a0a0" fg_color="#f0f0f0">
    <normal/>
  </style>
</tab_button_group>

<tab_button>
  <style name="default" margin="4" bg_color="#eeeeee" border_color="#808080" border="right">
    <normal     text_color="black" />
    <pressed    text_color="black" />
    <over       text_color="black" />
    <normal_of_active text_color="#1296db" /> 
    <pressed_of_active text_color="#1296db" />
    <over_of_active    text_color="#1296db" />
  </style>
</tab_button>

<pages>
  <style name="default" border_color="#a0a0a0" border="left|right|top">
    <normal/>
  </style>
</pages>