Show hex color code in filament page and improve styling

client/src/components/spoolIcon.css

@@ -3,7 +3,6 @@
   width: 1.5em;
   height: 2.5em;
   gap: 2px;
-  margin: 0 0.5em;
 }
 
 .spool-icon.vertical {

client/src/pages/filaments/show.tsx

@@ -89,6 +89,7 @@ export const FilamentShow: React.FC<IResourceComponentsProps> = () => {
       <TextField value={record?.name} />
       <Title level={5}>{t("filament.fields.color_hex")}</Title>
       {colorObj && <SpoolIcon color={colorObj} size="large" />}
+      {record?.color_hex && <TextField value={`#${record?.color_hex}`} />}
       <Title level={5}>{t("filament.fields.material")}</Title>
       <TextField value={record?.material} />
       <Title level={5}>{t("filament.fields.price")}</Title>