div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_hex"><a href="#val-to_hex" class="anchor"></a><code><span><span class="keyword">val</span> to_hex : <span>string <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_hex"><a href="#val-of_hex" class="anchor"></a><code><span><span class="keyword">val</span> of_hex : <span>string <span class="arrow">&#45;&gt;</span></span> <span>string option</s