diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
index e41a1c5a3..8ad2cd907 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
@@ -3,7 +3,6 @@ package com.simplemobiletools.calendar.activities
 import android.annotation.SuppressLint
 import android.app.DatePickerDialog
 import android.app.TimePickerDialog
-import android.graphics.PorterDuff
 import android.os.Bundle
 import android.text.method.LinkMovementMethod
 import android.view.Menu
@@ -732,11 +731,12 @@ class EventActivity : SimpleActivity(), DBHelper.EventUpdateListener {
     }
 
     private fun updateIconColors() {
-        event_time_image.setColorFilter(config.textColor, PorterDuff.Mode.SRC_IN)
-        event_repetition_image.setColorFilter(config.textColor, PorterDuff.Mode.SRC_IN)
-        event_reminder_image.setColorFilter(config.textColor, PorterDuff.Mode.SRC_IN)
-        event_type_image.setColorFilter(config.textColor, PorterDuff.Mode.SRC_IN)
-        event_caldav_calendar_image.setColorFilter(config.textColor, PorterDuff.Mode.SRC_IN)
+        val textColor = config.textColor
+        event_time_image.applyColorFilter(textColor)
+        event_repetition_image.applyColorFilter(textColor)
+        event_reminder_image.applyColorFilter(textColor)
+        event_type_image.applyColorFilter(textColor)
+        event_caldav_calendar_image.applyColorFilter(textColor)
     }
 
     override fun eventInserted(event: Event) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetMonthlyConfigureActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetMonthlyConfigureActivity.kt
index 6147db496..89833af77 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetMonthlyConfigureActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetMonthlyConfigureActivity.kt
@@ -6,7 +6,6 @@ import android.content.Context
 import android.content.Intent
 import android.content.res.Resources
 import android.graphics.Color
-import android.graphics.PorterDuff
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import android.widget.LinearLayout
@@ -23,6 +22,7 @@ import com.simplemobiletools.calendar.interfaces.MonthlyCalendar
 import com.simplemobiletools.calendar.models.DayMonthly
 import com.simplemobiletools.commons.dialogs.ColorPickerDialog
 import com.simplemobiletools.commons.extensions.adjustAlpha
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beVisible
 import kotlinx.android.synthetic.main.first_row.*
 import kotlinx.android.synthetic.main.top_navigation.*
@@ -130,8 +130,8 @@ class WidgetMonthlyConfigureActivity : AppCompatActivity(), MonthlyCalendar {
         mWeakTextColor = mTextColorWithoutTransparency.adjustAlpha(LOW_ALPHA)
         mPrimaryColor = config.primaryColor
 
-        top_left_arrow.drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
-        top_right_arrow.drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
+        top_left_arrow.applyColorFilter(mTextColor)
+        top_right_arrow.applyColorFilter(mTextColor)
         top_value.setTextColor(mTextColor)
         config_text_color.setBackgroundColor(mTextColor)
         config_save.setTextColor(mTextColor)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/DayEventsAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/DayEventsAdapter.kt
index 2e96e3fe2..c7e5e489a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/DayEventsAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/DayEventsAdapter.kt
@@ -1,6 +1,5 @@
 package com.simplemobiletools.calendar.adapters
 
-import android.graphics.PorterDuff
 import android.view.View
 import android.view.ViewGroup
 import com.simplemobiletools.calendar.R
@@ -10,6 +9,7 @@ import com.simplemobiletools.calendar.extensions.shareEvents
 import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.interfaces.DeleteEventsListener
 import com.simplemobiletools.calendar.models.Event
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beInvisible
 import com.simplemobiletools.commons.extensions.beInvisibleIf
 import kotlinx.android.synthetic.main.event_item_day_view.view.*
@@ -55,7 +55,7 @@ class DayEventsAdapter(activity: SimpleActivity, val events: List<Event>, val li
             event_item_description.text = if (replaceDescriptionWithLocation) event.location else event.description
             event_item_start.text = if (event.getIsAllDay()) allDayString else Formatter.getTimeFromTS(context, event.startTS)
             event_item_end.beInvisibleIf(event.startTS == event.endTS)
-            event_item_color.setColorFilter(event.color, PorterDuff.Mode.SRC_IN)
+            event_item_color.applyColorFilter(event.color)
 
             if (event.startTS != event.endTS) {
                 val startCode = Formatter.getDayCodeFromTS(event.startTS)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListAdapter.kt
index 711eeb4f2..2b91cbac6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListAdapter.kt
@@ -1,6 +1,5 @@
 package com.simplemobiletools.calendar.adapters
 
-import android.graphics.PorterDuff
 import android.view.View
 import android.view.ViewGroup
 import com.simplemobiletools.calendar.R
@@ -12,6 +11,7 @@ import com.simplemobiletools.calendar.interfaces.DeleteEventsListener
 import com.simplemobiletools.calendar.models.ListEvent
 import com.simplemobiletools.calendar.models.ListItem
 import com.simplemobiletools.calendar.models.ListSection
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beInvisible
 import com.simplemobiletools.commons.extensions.beInvisibleIf
 import kotlinx.android.synthetic.main.event_list_item.view.*
@@ -72,7 +72,7 @@ class EventListAdapter(activity: SimpleActivity, val listItems: List<ListItem>,
             event_item_description.text = if (replaceDescriptionWithLocation) listEvent.location else listEvent.description
             event_item_start.text = if (listEvent.isAllDay) allDayString else Formatter.getTimeFromTS(context, listEvent.startTS)
             event_item_end.beInvisibleIf(listEvent.startTS == listEvent.endTS)
-            event_item_color.setColorFilter(listEvent.color, PorterDuff.Mode.SRC_IN)
+            event_item_color.applyColorFilter(listEvent.color)
 
             if (listEvent.startTS != listEvent.endTS) {
                 val startCode = Formatter.getDayCodeFromTS(listEvent.startTS)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListWidgetAdapterOld.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListWidgetAdapterOld.kt
index 531c09b7a..524d92143 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListWidgetAdapterOld.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventListWidgetAdapterOld.kt
@@ -1,7 +1,6 @@
 package com.simplemobiletools.calendar.adapters
 
 import android.content.Context
-import android.graphics.PorterDuff
 import android.graphics.drawable.Drawable
 import android.view.LayoutInflater
 import android.view.View
@@ -14,6 +13,7 @@ import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.models.ListEvent
 import com.simplemobiletools.calendar.models.ListItem
 import com.simplemobiletools.calendar.models.ListSection
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beInvisibleIf
 import kotlinx.android.synthetic.main.event_list_item_widget.view.*
 
@@ -69,7 +69,7 @@ class EventListWidgetAdapterOld(val context: Context, val mEvents: List<ListItem
                 end?.setTextColor(mTextColor)
                 title.setTextColor(mTextColor)
                 description?.setTextColor(mTextColor)
-                color?.setColorFilter(mTextColor, PorterDuff.Mode.SRC_IN)
+                color?.applyColorFilter(mTextColor)
             }
         } else {
             val item = mEvents[position] as ListSection
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
index 65a764bf4..3d4f554a4 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
@@ -11,7 +11,6 @@ import android.content.Context
 import android.content.Intent
 import android.content.res.Resources
 import android.graphics.Color
-import android.graphics.PorterDuff
 import android.net.Uri
 import android.os.Build
 import android.support.v4.app.NotificationCompat
@@ -298,7 +297,7 @@ fun Context.addDayEvents(day: DayMonthly, linearLayout: LinearLayout, res: Resou
     val eventLayoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
 
     day.dayEvents.sortedWith(compareBy({ it.startTS }, { it.endTS }, { it.title })).forEach {
-        backgroundDrawable.mutate().setColorFilter(it.color, PorterDuff.Mode.SRC_IN)
+        backgroundDrawable.applyColorFilter(it.color)
         eventLayoutParams.setMargins(dividerMargin, 0, dividerMargin, dividerMargin)
 
         var textColor = it.color.getContrastColor()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/TextView.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/TextView.kt
index ee457da0d..41f9a9a52 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/TextView.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/TextView.kt
@@ -2,14 +2,14 @@ package com.simplemobiletools.calendar.extensions
 
 import android.content.res.Resources
 import android.graphics.Bitmap
-import android.graphics.PorterDuff
 import android.graphics.drawable.BitmapDrawable
 import android.widget.TextView
+import com.simplemobiletools.commons.extensions.applyColorFilter
 
 fun TextView.addResizedBackgroundDrawable(res: Resources, drawableHeight: Int, primaryColor: Int, drawableId: Int) {
     val baseDrawable = res.getDrawable(drawableId)
     val bitmap = (baseDrawable as BitmapDrawable).bitmap
     val scaledDrawable = BitmapDrawable(res, Bitmap.createScaledBitmap(bitmap, drawableHeight, drawableHeight, true))
-    scaledDrawable.mutate().setColorFilter(primaryColor, PorterDuff.Mode.SRC_IN)
+    scaledDrawable.applyColorFilter(primaryColor)
     background = scaledDrawable
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
index 329c09fe0..53c421dc8 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
@@ -2,7 +2,6 @@ package com.simplemobiletools.calendar.fragments
 
 import android.content.Intent
 import android.content.res.Resources
-import android.graphics.PorterDuff
 import android.os.Bundle
 import android.support.v4.app.Fragment
 import android.support.v7.app.AlertDialog
@@ -26,6 +25,7 @@ import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.interfaces.DeleteEventsListener
 import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.models.Event
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.setupDialogStuff
 import kotlinx.android.synthetic.main.fragment_day.view.*
 import kotlinx.android.synthetic.main.top_navigation.view.*
@@ -67,8 +67,8 @@ class DayFragment : Fragment(), DBHelper.EventUpdateListener, DeleteEventsListen
         mTextColor = context!!.config.textColor
 
         mHolder.apply {
-            top_left_arrow.drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
-            top_right_arrow.drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
+            top_left_arrow.applyColorFilter(mTextColor)
+            top_right_arrow.applyColorFilter(mTextColor)
             top_left_arrow.background = null
             top_right_arrow.background = null
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
index c9c7383cb..a84d2d734 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
@@ -3,7 +3,6 @@ package com.simplemobiletools.calendar.fragments
 import android.content.Context
 import android.content.Intent
 import android.content.res.Resources
-import android.graphics.PorterDuff
 import android.os.Bundle
 import android.support.v4.app.Fragment
 import android.support.v7.app.AlertDialog
@@ -24,6 +23,7 @@ import com.simplemobiletools.calendar.helpers.*
 import com.simplemobiletools.calendar.interfaces.MonthlyCalendar
 import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.models.DayMonthly
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beGone
 import com.simplemobiletools.commons.extensions.beVisibleIf
 import com.simplemobiletools.commons.extensions.setupDialogStuff
@@ -106,7 +106,7 @@ class MonthFragment : Fragment(), MonthlyCalendar {
         mPrimaryColor = mConfig.primaryColor
 
         mHolder.top_left_arrow.apply {
-            drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
+            applyColorFilter(mTextColor)
             background = null
             setOnClickListener {
                 listener?.goLeft()
@@ -114,7 +114,7 @@ class MonthFragment : Fragment(), MonthlyCalendar {
         }
 
         mHolder.top_right_arrow.apply {
-            drawable.mutate().setColorFilter(mTextColor, PorterDuff.Mode.SRC_ATOP)
+            applyColorFilter(mTextColor)
             background = null
             setOnClickListener {
                 listener?.goRight()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt
index 37c163c94..d1fa45543 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt
@@ -2,7 +2,6 @@ package com.simplemobiletools.calendar.fragments
 
 import android.content.Intent
 import android.content.res.Resources
-import android.graphics.PorterDuff
 import android.graphics.Rect
 import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
@@ -22,6 +21,7 @@ import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.interfaces.WeeklyCalendar
 import com.simplemobiletools.calendar.models.Event
 import com.simplemobiletools.calendar.views.MyScrollView
+import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beGone
 import com.simplemobiletools.commons.extensions.getContrastColor
 import kotlinx.android.synthetic.main.fragment_week.*
@@ -306,7 +306,7 @@ class WeekFragment : Fragment(), WeeklyCalendar {
             val minutes = DateTime().minuteOfDay
             val todayColumn = getColumnWithId(todayColumnIndex)
             (inflater.inflate(R.layout.week_now_marker, null, false) as ImageView).apply {
-                setColorFilter(primaryColor, PorterDuff.Mode.SRC_IN)
+                applyColorFilter(primaryColor)
                 mView.week_events_holder.addView(this, 0)
                 val extraWidth = (todayColumn.width * 0.3).toInt()
                 val markerHeight = resources.getDimension(R.dimen.weekly_view_now_height).toInt()