diff --git a/src/lang/en.json b/src/lang/en.json
index eec8033..42463e6 100644
--- a/src/lang/en.json
+++ b/src/lang/en.json
@@ -196,6 +196,7 @@
   "OSE.items.resetAttacks": "Reset all Attacks per Round",
   "OSE.items.hasShield": "Has a Shield bonus",
   "OSE.items.typeTag": "Type a comma separated list of tag e.g 'Melee,Missile (5’–10’ / 11’–20’ / 21’–30’)'",
+  "OSE.items.pattern": "Attack pattern marker",
 
   "OSE.armor.type": "Armor Type",
   "OSE.armor.unarmored": "Unarmored",
diff --git a/src/lang/fr.json b/src/lang/fr.json
index 2812053..a090264 100644
--- a/src/lang/fr.json
+++ b/src/lang/fr.json
@@ -196,6 +196,7 @@
   "OSE.items.resetAttacks": "Réinitialiser les Attaques",
   "OSE.items.hasShield": "A un bonus de Bouclier",
   "OSE.items.typeTag": "Tapez une liste de tags descriptifs ex. 'Mêlée,Missile (5’–10’ / 11’–20’ / 21’–30’)'",
+  "OSE.items.pattern": "Marqueur de schéma d'attaque",
 
   "OSE.armor.type": "Type d'Armure",
   "OSE.armor.unarmored": "Sans Armure",
diff --git a/src/module/actor/monster-sheet.js b/src/module/actor/monster-sheet.js
index 0643704..0c79b21 100644
--- a/src/module/actor/monster-sheet.js
+++ b/src/module/actor/monster-sheet.js
@@ -216,6 +216,22 @@ export class OseActorSheetMonster extends OseActorSheet {
       actorObject.rollHP({ event: event });
     });
 
+    html.find(".item-pattern").click(ev => {
+      const li = $(ev.currentTarget).parents(".item");
+      const item = this.actor.getOwnedItem(li.data("itemId"));
+      let currentColor = item.data.data.pattern;
+      let colors = Object.keys(CONFIG.OSE.colors);
+      let index = colors.indexOf(currentColor);
+      if (index + 1 == colors.length) {
+        index = 0;
+      } else {
+        index++;
+      }
+      item.update({
+        "data.pattern": colors[index]
+      })
+    });
+
     // Handle default listeners last so system listeners are triggered first
     super.activateListeners(html);
   }
diff --git a/src/scss/monster.scss b/src/scss/monster.scss
index 4d46d05..1ff1437 100644
--- a/src/scss/monster.scss
+++ b/src/scss/monster.scss
@@ -81,4 +81,14 @@
       }
     }
   }
+  .panel.abilities {
+    .item-list {
+      .item-entry {
+        .item-pattern {
+          flex: 0 0 15px;
+          cursor: pointer;
+        }
+      }  
+    }
+  }
 }
diff --git a/src/template.json b/src/template.json
index f2e4398..d57e992 100644
--- a/src/template.json
+++ b/src/template.json
@@ -167,6 +167,7 @@
       "weight": 80
     },
     "weapon": {
+      "pattern": "white",
       "description": "",
       "damage": "1d6",
       "bonus": 0,
@@ -204,6 +205,7 @@
       "save": ""
     },
     "ability": {
+      "pattern": "white",
       "requirements": "",
       "roll": "",
       "rollType": "result",
diff --git a/src/templates/actors/partials/monster-attributes-tab.html b/src/templates/actors/partials/monster-attributes-tab.html
index 5a32e59..5ad3f3c 100644
--- a/src/templates/actors/partials/monster-attributes-tab.html
+++ b/src/templates/actors/partials/monster-attributes-tab.html
@@ -94,6 +94,7 @@
                     {{#each abilities as |item|}}
                     <li class="item-entry">
                         <div class="item flexrow" data-item-id="{{item._id}}">
+                            <div class="item-pattern" title="{{localize 'OSE.items.pattern'}}" style="background:linear-gradient(0.25turn, {{item.data.pattern}}, transparent)"></div>
                             <div class="item-name {{#if item.data.roll}}item-rollable{{/if}} flexrow">
                                 <div class="item-image" style="background-image: url({{item.img}})"></div>
                                 <h4 title="{{item.name}}">
@@ -117,6 +118,9 @@
                     {{#each section as |item|}}
                     <li class="item-entry">
                         <div class="item flexrow" data-item-id="{{item._id}}">
+                            {{#if (eq item.type 'weapon')}}
+                            <div class="item-pattern" title="{{localize 'OSE.items.pattern'}}" style="background:linear-gradient(0.25turn, {{item.data.pattern}}, transparent)"></div>
+                            {{/if}}
                             <div class="item-name {{#if (eq item.type 'weapon')}}item-rollable{{/if}}  flexrow">
                                 <div class="item-image" style="background-image: url({{item.img}})"></div>
                                 <h4 title="{{item.name}}">