diff --git a/frontend/src/uxbox/main/data/users.cljs b/frontend/src/uxbox/main/data/users.cljs
index cc104fd9f..32b0a509e 100644
--- a/frontend/src/uxbox/main/data/users.cljs
+++ b/frontend/src/uxbox/main/data/users.cljs
@@ -44,15 +44,21 @@
 ;; --- Profile Fetched
 
 (defn profile-fetched
-  [data]
+  [{:keys [fullname] :as data}]
   (us/verify ::profile data)
   (ptk/reify ::profile-fetched
     ptk/UpdateEvent
     (update [_ state]
-      (let [profile (avatars/assign data)]
-        (assoc state :profile (cond-> profile
-                                (nil? (:lang data)) (assoc :lang cfg/default-language)
-                                (nil? (:theme data)) (assoc :theme cfg/default-theme)))))
+      (assoc state :profile
+             (cond-> data
+               (nil? (:photo-uri data))
+               (assoc :photo-uri (avatars/generate {:name fullname}))
+
+               (nil? (:lang data))
+               (assoc :lang cfg/default-language)
+
+               (nil? (:theme data))
+               (assoc :theme cfg/default-theme))))
 
     ptk/EffectEvent
     (effect [_ state stream]
diff --git a/frontend/src/uxbox/main/data/workspace.cljs b/frontend/src/uxbox/main/data/workspace.cljs
index d622567bd..3326f591d 100644
--- a/frontend/src/uxbox/main/data/workspace.cljs
+++ b/frontend/src/uxbox/main/data/workspace.cljs
@@ -295,26 +295,52 @@
       (ws/-close (get-in state [:ws file-id]))
       (rx/of ::finalize-ws))))
 
-;; --- Handle: Who
+;; --- Handle: Presence
+
+(def ^:private presence-palette
+  #{"#2e8b57" ; seagreen
+    "#808000" ; olive
+    "#b22222" ; firebrick
+    "#ff8c00" ; darkorage
+    "#ffd700" ; gold
+    "#ba55d3" ; mediumorchid
+    "#00fa9a" ; mediumspringgreen
+    "#00bfff" ; deepskyblue
+    "#dda0dd" ; plum
+    "#ff1493" ; deeppink
+    "#ffa07a" ; lightsalmon
+    })
 
 (defn handle-presence
   [{:keys [sessions] :as msg}]
-  (ptk/reify ::handle-presence
-    ptk/UpdateEvent
-    (update [_ state]
-      (let [users (:workspace-users state)]
-        (update state :workspace-presence
-                (fn [prev-sessions]
-                  (reduce (fn [acc [sid pid]]
-                            (if-let [prev (get prev-sessions sid)]
-                              (assoc acc sid prev)
-                              (let [profile (get users pid)
-                                    session {:id sid
-                                             :fullname (:fullname profile)
-                                             :photo-uri (:photo-uri profile)}]
-                                (assoc acc sid (avatars/assign session)))))
-                          {}
-                          sessions)))))))
+  (letfn [(assign-color [sessions session]
+            (if (string? (:color session))
+              session
+              (let [used (into #{}
+                               (comp (map second)
+                                     (map :color)
+                                     (remove nil?))
+                               sessions)
+                    avail (set/difference presence-palette used)
+                    color (or (first avail) "#000000")]
+                (assoc session :color color))))
+          (update-sessions [previous profiles]
+            (reduce (fn [current [session-id profile-id]]
+                      (let [profile (get profiles profile-id)
+                            session {:id session-id
+                                     :fullname (:fullname profile)
+                                     :photo-uri (or (:photo-uri profile)
+                                                    (avatars/generate {:name (:fullname profile)}))}
+                            session (assign-color current session)]
+                        (assoc current session-id session)))
+                    (select-keys previous (map first sessions))
+                    (filter (fn [[sid]] (not (contains? previous sid))) sessions)))]
+
+    (ptk/reify ::handle-presence
+      ptk/UpdateEvent
+      (update [_ state]
+        (let [profiles  (:workspace-users state)]
+          (update state :workspace-presence update-sessions profiles))))))
 
 (defn handle-pointer-update
   [{:keys [page-id profile-id session-id x y] :as msg}]
diff --git a/frontend/src/uxbox/main/data/workspace/texts.cljs b/frontend/src/uxbox/main/data/workspace/texts.cljs
index 6dda7bf12..7254adf47 100644
--- a/frontend/src/uxbox/main/data/workspace/texts.cljs
+++ b/frontend/src/uxbox/main/data/workspace/texts.cljs
@@ -45,7 +45,7 @@
   ([editor props options]
    (when (and (nil? (obj/get editor "selection"))
               (nil? (obj/get options "at")))
-     (obj/assoc! options "at" (calculate-full-selection editor)))
+     (obj/set! options "at" (calculate-full-selection editor)))
    (.setNodes Transforms editor props options)
    editor))
 
@@ -106,10 +106,10 @@
     (let [options #js {:match pred :universal universal?}]
       (cond
         (object? at)
-        (obj/assoc! options "at" at)
+        (obj/set! options "at" at)
 
         (nil? (obj/get editor "selection"))
-        (obj/assoc! options "at" (calculate-full-selection editor)))
+        (obj/set! options "at" (calculate-full-selection editor)))
 
       (let [result (.nodes Editor editor options)
             match  (ffirst (es6-iterator-seq result))]
diff --git a/frontend/src/uxbox/main/ui/shapes/text.cljs b/frontend/src/uxbox/main/ui/shapes/text.cljs
index 6a5206c42..ea5ce8596 100644
--- a/frontend/src/uxbox/main/ui/shapes/text.cljs
+++ b/frontend/src/uxbox/main/ui/shapes/text.cljs
@@ -80,9 +80,9 @@
                     :width "100%"
                     :display "flex"}]
     (cond-> base
-      (= valign "top") (obj/assoc! "alignItems" "flex-start")
-      (= valign "center") (obj/assoc! "alignItems" "center")
-      (= valign "bottom") (obj/assoc! "alignItems" "flex-end"))))
+      (= valign "top") (obj/set! "alignItems" "flex-start")
+      (= valign "center") (obj/set! "alignItems" "center")
+      (= valign "bottom") (obj/set! "alignItems" "flex-end"))))
 
 (mf/defc rt-text-box
   {::mf/wrap-props false
@@ -93,8 +93,8 @@
         data   (obj/get props "element")
         type   (obj/get data "type")
         style  (generate-text-box-styles data)
-        attrs  (obj/assoc! attrs "style" style)
-        attrs  (obj/assoc! attrs "className" type)]
+        attrs  (obj/set! attrs "style" style)
+        attrs  (obj/set! attrs "className" type)]
     [:> :div attrs childs]))
 
 (defn- generate-text-styles
@@ -113,8 +113,8 @@
         data   (obj/get props "element")
         type   (obj/get data "type")
         style  (generate-text-styles data)
-        attrs  (obj/assoc! attrs "style" style)
-        attrs  (obj/assoc! attrs "className" type)]
+        attrs  (obj/set! attrs "style" style)
+        attrs  (obj/set! attrs "className" type)]
     [:> :div attrs childs]))
 
 (defn- generate-paragraph-styles
@@ -125,8 +125,8 @@
         lh (obj/get data "lineHeight")
         ta (obj/get data "textAlign")]
     (cond-> base
-      ta (obj/assoc! "textAlign" ta)
-      lh (obj/assoc! "lineHeight" lh))))
+      ta (obj/set! "textAlign" ta)
+      lh (obj/set! "lineHeight" lh))))
 
 (mf/defc rt-pharagraph
   {::mf/wrap-props false
@@ -136,7 +136,7 @@
         childs (obj/get props "children")
         data   (obj/get props "element")
         style  (generate-paragraph-styles data)
-        attrs  (obj/assoc! attrs "style" style)]
+        attrs  (obj/set! attrs "style" style)]
     [:> :p attrs childs]))
 
 (defn- generate-leaf-styles
@@ -162,11 +162,11 @@
 
     (when (and (string? letter-spacing)
                (pos? (alength letter-spacing)))
-      (obj/assoc! base "letterSpacing" (str letter-spacing "px")))
+      (obj/set! base "letterSpacing" (str letter-spacing "px")))
 
     (when (and (string? font-size)
                (pos? (alength font-size)))
-      (obj/assoc! base "fontSize" (str font-size "px")))
+      (obj/set! base "fontSize" (str font-size "px")))
 
     (when (and (string? font-id)
                (pos? (alength font-id)))
@@ -180,9 +180,9 @@
                               (obj/get data "fontStyle"))
               font-weight (or (:weight font-variant)
                               (obj/get data "fontWeight"))]
-          (obj/assoc! base "fontFamily" font-family)
-          (obj/assoc! base "fontStyle" font-style)
-          (obj/assoc! base "fontWeight" font-weight))))
+          (obj/set! base "fontFamily" font-family)
+          (obj/set! base "fontStyle" font-style)
+          (obj/set! base "fontWeight" font-weight))))
 
     base))
 
@@ -194,7 +194,7 @@
         childs (obj/get props "children")
         data   (obj/get props "leaf")
         style  (generate-leaf-styles data)
-        attrs  (obj/assoc! attrs "style" style)]
+        attrs  (obj/set! attrs "style" style)]
     [:> :span attrs childs]))
 
 (defn- render-element
@@ -298,7 +298,7 @@
                    (dom/prevent-default event)
                    (dom/stop-propagation event)
                    ;; WARN: monky patch
-                   (obj/assoc! slate/Transforms "deselect" (constantly nil)))
+                   (obj/set! slate/Transforms "deselect" (constantly nil)))
         :placeholder "Type some text here..."}]]]))
 
 ;; --- Text Shape Wrapper
diff --git a/frontend/src/uxbox/util/avatars.cljs b/frontend/src/uxbox/util/avatars.cljs
index d9122ae9f..dab27164a 100644
--- a/frontend/src/uxbox/util/avatars.cljs
+++ b/frontend/src/uxbox/util/avatars.cljs
@@ -13,7 +13,7 @@
    [uxbox.util.object :as obj]
    ["randomcolor" :as rdcolor]))
 
-(defn- impl-generate-image
+(defn generate
   [{:keys [name color size]
     :or {color "#303236" size 128}}]
   (let [parts   (str/words (str/upper name))
@@ -23,19 +23,15 @@
         canvas  (.createElement js/document "canvas")
         context (.getContext canvas "2d")]
 
-    (set! (.-width canvas) size)
-    (set! (.-height canvas) size)
-    (set! (.-fillStyle context) "#303236")
+    (obj/set! canvas "width" size)
+    (obj/set! canvas "height" size)
+
+    (obj/set! context "fillStyle" color)
     (.fillRect context 0 0 size size)
 
-    (set! (.-font context) (str (/ size 2) "px Arial"))
-    (set! (.-textAlign context) "center")
-    (set! (.-fillStyle context) "#FFFFFF")
+    (obj/set! context "font" (str (/ size 2) "px Arial"))
+    (obj/set! context "textAlign" "center")
+    (obj/set! context "fillStyle" "#FFFFFF")
     (.fillText context letters (/ size 2) (/ size 1.5))
-    (.toDataURL canvas)))
 
-(defn assign
-  [{:keys [id photo-uri fullname color] :as profile}]
-  (cond-> profile
-    (not photo-uri) (assoc :photo-uri (impl-generate-image {:name fullname}))
-    (not color) (assoc :color (rdcolor))))
+    (.toDataURL canvas)))
diff --git a/frontend/src/uxbox/util/color.cljs b/frontend/src/uxbox/util/color.cljs
index b03f61ea0..f4a7c3f61 100644
--- a/frontend/src/uxbox/util/color.cljs
+++ b/frontend/src/uxbox/util/color.cljs
@@ -2,14 +2,17 @@
 ;; License, v. 2.0. If a copy of the MPL was not distributed with this
 ;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
 ;;
-;; Copyright (c) 2015-2016 Andrey Antukh <niwi@niwi.nz>
-;; Copyright (c) 2015-2016 Juan de la Cruz <delacruzgarciajuan@gmail.com>
+;; This Source Code Form is "Incompatible With Secondary Licenses", as
+;; defined by the Mozilla Public License, v. 2.0.
+;;
+;; Copyright (c) 2020 UXBOX Labs SL
 
 (ns uxbox.util.color
   "Color conversion utils."
-  (:require [cuerdas.core :as str]
-            [uxbox.util.math :as math]
-            [goog.color :as gcolor]))
+  (:require
+   [cuerdas.core :as str]
+   [uxbox.util.math :as math]
+   [goog.color :as gcolor]))
 
 (defn rgb->str
   [color]
diff --git a/frontend/src/uxbox/util/object.cljs b/frontend/src/uxbox/util/object.cljs
index dabc12f65..53b229f22 100644
--- a/frontend/src/uxbox/util/object.cljs
+++ b/frontend/src/uxbox/util/object.cljs
@@ -34,14 +34,13 @@
                (rest keys)
                (unchecked-get res key))))))
 
-(defn assign!
+(defn merge!
   ([a b]
    (js/Object.assign a b))
   ([a b & more]
-   (reduce assign! (assign! a b) more)))
+   (reduce merge! (merge! a b) more)))
 
-(defn assoc!
-  [obj attr value]
-  (when (object? obj)
-    (unchecked-set obj attr value)
-    obj))
+(defn set!
+  [obj key value]
+  (unchecked-set obj key value)
+  obj)