jitsi_app_c0/css/_avatar.scss

.avatar {
    align-items: center;
    background-color: #AAA;
    display: flex;
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 100;
    justify-content: center;
    object-fit: cover;
}

.defaultAvatar {
    opacity: 0.6
}