I'm trying to use the accordion component in an ArcGIS Hub page and have figured out how to change the colors for almost everything except this blue border that appears when you expand the component. I tried using --calcite-accordion-border-color per Accordion | Calcite Design System | Esri Developer , but that only adds a very thin border to the bottom of the accordion. Any ideas? It's obviously not an urgent need but the perfectionist in me wants it to match our branding.

<calcite-accordion appearance="transparent" icon-position="start" scale="l" selection-mode="single" icon-type="chevron" calcite-hydrated="">
<calcite-accordion-item heading="ArcMap Deprecation" style="background-color:#A2350A; color:#ffffff; border-bottom:5px solid #ffffff; --calcite-color-text-1:#fff; ;--calcite-color-text-2:#fff; --calcite-color-text-3:#fff; --calcite-accordion-border-color:#D07954;" calcite-hydrated="">
<div class="panel-body" style="background-color:#fff; color:#4c4c4c;">
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</div>
</calcite-accordion-item>
</calcite-accordion>