Ghost/ghost/admin/lib/koenig-editor/addon/templates/components/koenig-toolbar.hbs

<ul class="kg-action-bar bg-darkgrey-d1 inline-flex pa0 ma0 pl1 pr1 nl1 list br3 shadow-2 items-center relative white f8 fw6 tracked-2 {{if showToolbar "anim-fast-bezier" "o-0 pop-down"}}">
    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Bold"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "toggleMarkup" "strong"}}
        >
            {{svg-jar "koenig/kg-bold" class=(concat (if activeMarkupTagNames.isStrong "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>
    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Italic"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "toggleMarkup" "em"}}
        >
            {{svg-jar "koenig/kg-italic" class=(concat (if (or activeMarkupTagNames.isEm activeMarkupTagNames.isI) "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>
    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Heading One"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "toggleHeaderSection" "h1"}}
        >
            {{svg-jar "koenig/kg-heading-1" class=(concat (if activeSectionTagNames.isH1 "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>
    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Heading Two"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "toggleHeaderSection" "h2"}}
        >
            {{svg-jar "koenig/kg-heading-2" class=(concat (if activeSectionTagNames.isH2 "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>

    <li class="ma0 lh-solid kg-action-bar-divider bg-darkgrey-l2 h5"></li>

    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Quote"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "toggleSection" "blockquote"}}
        >
            {{svg-jar "koenig/kg-quote" class=(concat (if activeSectionTagNames.isBlockquote "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>
    <li class="ma0 lh-solid">
        <button
            type="button"
            title="Link"
            class="dib dim-lite link h10 w9 nudge-top--1"
            {{action "editLink"}}
        >
            {{svg-jar "koenig/kg-link" class=(concat (if activeMarkupTagNames.isA "fill-blue-l2" "fill-white") " w4 h4")}}
        </button>
    </li>
</ul>