diff --git a/htdocs/comm/action/list.php b/htdocs/comm/action/list.php
index ec42c0257af..096771c9ea7 100644
--- a/htdocs/comm/action/list.php
+++ b/htdocs/comm/action/list.php
@@ -890,6 +890,7 @@ $i = 0;
 //$totalarray['nbfield'] = 0;
 $imaxinloop = ($limit ? min($num, $limit) : $num);
 $today_start_date_time = dol_now();
+$cache_user_list = array();
 while ($i < $imaxinloop) {
 	$obj = $db->fetch_object($resql);
 	if (empty($obj)) {
@@ -924,36 +925,54 @@ while ($i < $imaxinloop) {
 		$actionstatic->fetchResources();
 	}
 
-	// get event color
-	$event_color = '';
+	// cache of user list (owners)
+	if ($obj->fk_user_action > 0 && !isset($cache_user_list[$obj->fk_user_action])) {
+		$res = $userstatic->fetch($obj->fk_user_action);
+		if ($res > 0) {
+			$cache_user_list[$obj->fk_user_action] = $userstatic;
+		}
+	}
+
+	// get event style for user owner
+	$event_owner_style = '';
+	// We decide to choose color of owner of event (event->userownerid is user id of owner, event->userassigned contains all users assigned to event)
+	if ($cache_user_list[$obj->fk_user_action]->color != '') {
+		$event_owner_style .= 'border-left: #' . $cache_user_list[$obj->fk_user_action]->color . ' 5px solid;';
+	}
+
+	// get event style for start date
 	$event_more_class = '';
+	$event_start_date_style = '';
 	$event_start_date_time = $actionstatic->datep;
 	if ($obj->fulldayevent) {
 		$today_start_date_time = dol_mktime(0, 0, 0, date('m', $today_start_date_time), date('d', $today_start_date_time), date('Y', $today_start_date_time));
 	}
 	if ($event_start_date_time > $today_start_date_time) {
 		// future event
-		$event_color = $conf->global->AGENDA_EVENT_FUTURE_COLOR;
 		$event_more_class = 'event-future';
+		$event_start_date_color = $conf->global->AGENDA_EVENT_FUTURE_COLOR;
 	} else {
 		// check event end date
 		$event_end_date_time = $db->jdate($obj->dp2);
 		if ($event_end_date_time != null && $event_end_date_time < $today_start_date_time) {
 			// past event
-			$event_color = $conf->global->AGENDA_EVENT_PAST_COLOR;
 			$event_more_class = 'event-past';
+			$event_start_date_color = $conf->global->AGENDA_EVENT_PAST_COLOR;
 		} elseif ($event_end_date_time == null && $event_start_date_time < $today_start_date_time) {
 			// past event
-			$event_color = $conf->global->AGENDA_EVENT_PAST_COLOR;
 			$event_more_class = 'event-past';
+			$event_start_date_color = $conf->global->AGENDA_EVENT_PAST_COLOR;
 		} else {
 			// current event
-			$event_color = $conf->global->AGENDA_EVENT_CURRENT_COLOR;
 			$event_more_class = 'event-current';
+			$event_start_date_color = $conf->global->AGENDA_EVENT_CURRENT_COLOR;
 		}
 	}
+	if ($event_start_date_color != '') {
+		$event_start_date_style .= 'background: #' . $event_start_date_color . ';';
+	}
 
-	print '<tr class="oddeven' . ($event_more_class != '' ? ' '.$event_more_class : '') . '"' . ($event_color != '' ? ' style="background: #'.$event_color.';"' : '') . '>';
+	print '<tr class="oddeven' . ($event_more_class != '' ? ' '.$event_more_class : '') . '"' . '>';
 
 	// Ref
 	if (!empty($arrayfields['a.id']['checked'])) {
@@ -964,10 +983,15 @@ while ($i < $imaxinloop) {
 
 	// User owner
 	if (!empty($arrayfields['owner']['checked'])) {
-		print '<td class="tdoverflowmax150">'; // With edge and chrome the td overflow is not supported correctly when content is not full text.
-		if ($obj->fk_user_action > 0) {
-			$userstatic->fetch($obj->fk_user_action);
-			print $userstatic->getNomUrl(-1);
+		print '<td class="tdoverflowmax150"' . ($event_owner_style != '' ? ' style="'.$event_owner_style.'"' : '') . '>'; // With edge and chrome the td overflow is not supported correctly when content is not full text.
+		if ($obj->fk_user_action > 0 && !isset($cache_user_list[$obj->fk_user_action])) {
+			$res = $userstatic->fetch($obj->fk_user_action);
+			if ($res > 0) {
+				$cache_user_list[$obj->fk_user_action] = $userstatic;
+			}
+		}
+		if (isset($cache_user_list[$obj->fk_user_action])) {
+			print $cache_user_list[$obj->fk_user_action]->getNomUrl(-1);
 		} else {
 			print '&nbsp;';
 		}
@@ -1015,7 +1039,7 @@ while ($i < $imaxinloop) {
 
 	// Start date
 	if (!empty($arrayfields['a.datep']['checked'])) {
-		print '<td class="center nowraponall">';
+		print '<td class="center nowraponall"' . ($event_start_date_style != '' ? ' style="'.$event_start_date_style.'"' : '') . '>';
 		if (empty($obj->fulldayevent)) {
 			print dol_print_date($db->jdate($obj->dp), $formatToUse, 'tzuserrel');
 		} else {