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

<system_bar>
  <style name="default">
    <normal bg_color="#404040"/>
  </style>
</system_bar>

<label>
  <style name="title" text_align_h="left">
    <normal text_color="white" />
  </style>
</label>

<digit_clock>
  <style name="time">
    <normal text_color="white" />
  </style>
</digit_clock>

<button>
  <style name="close" icon="earth">
    <normal     icon="close_n"/>
    <pressed    icon="close_p"/>
    <over       icon="close_n"/>
    <disable    icon="close_d"/>
  </style>
</button>