opacity

<svg fill="currentColor" xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 -960 960 960"><path d="M253.5-210.5Q160-301 160-434q0-66 25.5-123T255-658l225-222 225 222q44 44 69.5 101T800-434q0 133-93.5 223.5T480-120q-133 0-226.5-90.5ZM223-400h514q13-69-15-127t-56-85L480-795 294-612q-28 27-56 85t-15 127Z"/></svg>

<i class="ti ti-opacity"></i>

ti ti-opacity

<i class="ti ti-037228"></i>

ti ti-037228

<svg aria-hidden="true" focusable="false" fill="currentColor" xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 -960 960 960"><path d="M253.5-210.5Q160-301 160-434q0-66 25.5-123T255-658l225-222 225 222q44 44 69.5 101T800-434q0 133-93.5 223.5T480-120q-133 0-226.5-90.5ZM223-400h514q13-69-15-127t-56-85L480-795 294-612q-28 27-56 85t-15 127Z"/></svg>

<svg aria-hidden="true" focusable="false" fill="currentColor" xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 -960 960 960"><path d="M253.5-210.5Q160-301 160-434q0-66 25.5-123T255-658l225-222 225 222q44 44 69.5 101T800-434q0 133-93.5 223.5T480-120q-133 0-226.5-90.5ZM223-400h514q13-69-15-127t-56-85L480-795 294-612q-28 27-56 85t-15 127Z"/></svg>

https://cdn.jsdelivr.net/npm/@ticnob/icons@1/icons/opacity.svg