styles.scss

$bronzo-filter: "data:image/svg+xml;utf8,<svg version='1.1' xmlns='http://www.w3.org/2000/svg' height='0'>
<defs>
<filter id='bronzo-filter'>
    <feColorMatrix type='luminanceToAlpha' result='L2A'/>
    <feFlood flood-color='cyan' result='colorfield'/>
    <feBlend mode='multiply' in='L2A' in2='colorfield'/>
    <feComposite operator='in' in2='SourceGraphic'/>
</filter>
</defs>
</svg>#bronzo-filter";