<svg version="1.1" baseProfile="full" width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
    <circle cx="10" cy="10" r="10" fill="#000" fill-opacity="0.35"/>
    <text x="10" y="15" font-size="15" font-family="sans-serif" font-weight="bold" text-anchor="middle" fill="#000">{{ label[0:1]|upper }}</text>
</svg>