title: Lightningchart js ButtonBox border color
body: <p>Need help with coloring the ButtonBox border (yellow lines).</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>this.chart
        .addUIElement(UIElementBuilders.ButtonBox.setBackground(UIBackgrounds.Rectangle))
        .setPosition({ x: 18, y: 99 })
        .setOrigin(UIOrigins.RightTop)
        .setText("Download PNG Image")
        .setPadding({ top: 5, right: 20, bottom: 5, left: 20 })
        .setButtonOffSize(0)
        .setButtonOnSize(0)
        .setDraggingMode(UIDraggingModes.notDraggable)
        .onMouseClick((event) =&gt; {
          this.chart.saveToFile(this.chart.getTitle())
        })
    }</code></pre>
  </div>
  </div>
  </p>
  <p>Chart screenshot:
  <a href="https://i.stack.imgur.com/IzvqJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IzvqJ.png" alt="Chart screenshot:" /></a></p>