diff --git a/calendar/js/et2_widget_daycol.js b/calendar/js/et2_widget_daycol.js
index afdb49a11d..0cd14c19ed 100644
--- a/calendar/js/et2_widget_daycol.js
+++ b/calendar/js/et2_widget_daycol.js
@@ -582,7 +582,7 @@ var et2_calendar_daycol = et2_valueWidget.extend([et2_IDetachedDOM, et2_IResizea
 			}
 
 			// Reset
-			event.title.css('top','');
+			event.title.css({'top':'','background-color':''});
 			event.body.css('padding-top','');
 			var hidden = isHidden.call(this,event.div);
 			if(!hidden)
@@ -593,7 +593,10 @@ var et2_calendar_daycol = et2_valueWidget.extend([et2_IDetachedDOM, et2_IResizea
 			// Bottom hidden is fine
 			if(hidden.hidden === 'top' && !hidden.completely)
 			{
-				event.title.css('top',timegrid.scrolling.scrollTop() - event.div.position().top);
+				event.title.css({
+					'top': timegrid.scrolling.scrollTop() - event.div.position().top,
+					'background-color': 'transparent'
+				});
 				event.body.css('padding-top',timegrid.scrolling.scrollTop() - event.div.position().top);
 			}
 			// Too many in gridlist view, show indicator
diff --git a/calendar/templates/default/app.css b/calendar/templates/default/app.css
index e307096cf8..16239b6761 100644
--- a/calendar/templates/default/app.css
+++ b/calendar/templates/default/app.css
@@ -46,7 +46,7 @@
 	background: inherit;
 }
 #calendar-sidebox_date .calendar_calHoliday a {
-	background-color: #dac0c0;
+	background-color: rgba(103, 159, 210, 0.5);
 }
 
 /* Toolbar */
@@ -156,14 +156,13 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
 /* marks a day in the colum-header as holiday
  */
 .calendar_calHoliday{
-	background: #dac0c0;
+	background-color: rgba(103, 159, 210, 0.5);
 }
 /* marks a day in the column-header additionaly as birthday of some contact,
  * it should work together with the backgrounds of calendar_calToday, calendar_calHoliday, th, row_on and row_off
  */
 .calendar_calBirthday,.calendar_calBirthday a{
 	color: #626161;
-	font-style: italic;
 }
 
 /* timeGridWidget, contains timeRow's and dayCol's
@@ -611,9 +610,6 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
 	white-space: normal;
 	background-color: rgba(255,255,255,0.9);
 }
-[data-full_day="true"] .calendar_calEventBody {
-	background-color: white;
-}
 .calendar_calEventBody > p, .calendar_calEventBodySmall > p {
 	white-space: pre-wrap;
 }
diff --git a/calendar/templates/pixelegg/app.css b/calendar/templates/pixelegg/app.css
index 59ddca3584..a2065d0bf4 100755
--- a/calendar/templates/pixelegg/app.css
+++ b/calendar/templates/pixelegg/app.css
@@ -671,11 +671,7 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
 }
 /* marks a day in the colum-header as holiday
 */
-.calendar_calHoliday {
-  background-color: #679fd2;
-}
 .calendar_calHoliday a {
-  color: #e6e6e6 !important;
   font-size: 0.9em;
 }
 /* marks a day in the column-header additionaly as birthday of some contact,
@@ -778,10 +774,15 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
      *  border-color: depending on category
      *  background: depending on category (shade)
      */
+  background-color: #679fd2;
 }
 .calendar_calEvent:hover {
   cursor: pointer;
 }
+.calendar_calEvent:not([class*=" cat_"]) {
+  /* Defaults for no category, so we don't override it */
+  background-color: #679fd2;
+}
 /**
  * All participants accepted the invitation
  */
@@ -1314,9 +1315,6 @@ div#calendar-container div.calendar table tbody tr.rowhilite td {
 #calendar_merge {
   font-size: 11px;
 }
-#calendar-sidebox_date .calendar_calHoliday a {
-  background-color: #679fd2;
-}
 #uical_select_owner {
   margin: 9px 0 9px;
 }
diff --git a/calendar/templates/pixelegg/app.less b/calendar/templates/pixelegg/app.less
index 6ab8ee7df8..81dffaef48 100755
--- a/calendar/templates/pixelegg/app.less
+++ b/calendar/templates/pixelegg/app.less
@@ -782,9 +782,7 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
 /* marks a day in the colum-header as holiday
 */
 .calendar_calHoliday{
-    background-color: @egw_color_2_e;
     a {
-        color: @gray_10 !important;
         font-size: 0.9em;
     }
 }
@@ -911,11 +909,15 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
      *  border-color: depending on category
      *  background: depending on category (shade)
      */
+	background-color: @egw_color_blue_lightest;
 }
 .calendar_calEvent:hover{
     cursor: pointer;
 }
-
+.calendar_calEvent:not([class*=" cat_"]) {
+	/* Defaults for no category, so we don't override it */
+	background-color:  @egw_color_blue_lightest;
+}
 /**
  * All participants accepted the invitation
  */
@@ -1349,9 +1351,6 @@ div#calendar-container {
 #calendar_merge{
     font-size: 11px;
 }
-#calendar-sidebox_date .calendar_calHoliday a {
-	background-color: @egw_color_2_e;
-}
 // Owner
 #uical_select_owner {margin: 9px 0 9px;}