Это можно сделать, но в SVG:
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 512.001 512.001" style="enable-background:new 0 0 512.001 512.001;" xml:space="preserve">
<path style="fill:#464655;" d="M512,200.093H0V97.104c0-4.875,3.953-8.828,8.828-8.828h494.345c4.875,0,8.828,3.953,8.828,8.828 L512,200.093L512,200.093z"/>
<path style="fill:#FFE15A;" d="M503.172,423.725H8.828c-4.875,0-8.828-3.953-8.828-8.828V311.909h512v102.988 C512,419.773,508.047,423.725,503.172,423.725z"/>
<rect y="200.091" style="fill:#FF4B55;" width="512" height="111.81"/></svg>