zulip/web/templates/stream_settings/stream_privacy_icon.hbs

{{! This controls whether the swatch next to streams in the stream edit page has a lock icon. }}
{{#if invite_only}}
<div class="large-icon" {{#if title_icon_color}}style="color: {{title_icon_color}}{{/if}}">
    <i class="zulip-icon zulip-icon-lock" aria-hidden="true"></i>
</div>
{{else if is_web_public}}
<div class="large-icon" {{#if title_icon_color}}style="color: {{title_icon_color}}{{/if}}">
    <i class="zulip-icon zulip-icon-globe" aria-hidden="true"></i>
</div>
{{else}}
<div class="large-icon" {{#if title_icon_color}}style="color: {{title_icon_color}}{{/if}}">
    <i class="zulip-icon zulip-icon-hashtag" aria-hidden="true"></i>
</div>
{{/if}}