chore: fix style for description

Author: l4rm4nd

myapp/templates/inventory.html

@@ -114,7 +114,7 @@ <h6>{{ entry.item.name }}</h6>
                       {% endif %}
                       {% if preferences.show_description %}
                       {% if entry.item.description %}
-                      <div class="default-tile" style="background-color: {{ entry.item.tile_color|default:'#1e1e1e1'|darken }};text-align: justify;">
+                      <div class="default-tile" style="background-color: {{ entry.item.tile_color|default:'#placeholder'|darken }};text-align: justify;">
                           <b>{% trans "Description" %}:</b><br>
                           <span class="content">{{ entry.item.description }}</span>
                       </div>