diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
index 24519224..3ba71387 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/AbstractChartFragment.java
@@ -81,7 +81,7 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
     protected static final class ActivityConfig {
         public final int type;
         public final String label;
-        public final Integer color;
+        public Integer color;
 
         public ActivityConfig(int kind, String label, Integer color) {
             this.type = kind;
@@ -94,10 +94,13 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
     protected ActivityConfig akLightSleep = new ActivityConfig(ActivityKind.TYPE_LIGHT_SLEEP, "Light Sleep", Color.rgb(182, 191, 255));
     protected ActivityConfig akDeepSleep = new ActivityConfig(ActivityKind.TYPE_DEEP_SLEEP, "Deep Sleep", Color.rgb(76, 90, 255));
 
-    protected static final int BACKGROUND_COLOR = Color.rgb(24, 22, 24);
-    protected static final int DESCRIPTION_COLOR = Color.WHITE;
-    protected static final int CHART_TEXT_COLOR = Color.WHITE;
-    protected static final int LEGEND_TEXT_COLOR = Color.WHITE;
+    protected int BACKGROUND_COLOR;
+    protected int DESCRIPTION_COLOR;
+    protected int CHART_TEXT_COLOR;
+    protected int LEGEND_TEXT_COLOR;
+    protected int AK_ACTIVITY_COLOR;
+    protected int AK_DEEP_SLEEP_COLOR;
+    protected int AK_LIGHT_SLEEP_COLOR;
 
     protected AbstractChartFragment(String... intentFilterActions) {
         mIntentFilterActions = new HashSet<>();
@@ -113,6 +116,8 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        initColors();
+
         IntentFilter filter = new IntentFilter();
         for (String action : mIntentFilterActions) {
             filter.addAction(action);
@@ -120,6 +125,20 @@ public abstract class AbstractChartFragment extends AbstractGBFragment {
         LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mReceiver, filter);
     }
 
+    protected void initColors() {
+        BACKGROUND_COLOR = getResources().getColor(R.color.background_material_light);
+        DESCRIPTION_COLOR = getResources().getColor(R.color.primarytext);
+        CHART_TEXT_COLOR = getResources().getColor(R.color.secondarytext);
+        LEGEND_TEXT_COLOR = getResources().getColor(R.color.primarytext);
+        AK_ACTIVITY_COLOR = getResources().getColor(R.color.chart_activity_light);
+        AK_DEEP_SLEEP_COLOR = getResources().getColor(R.color.chart_light_sleep_light);
+        AK_LIGHT_SLEEP_COLOR = getResources().getColor(R.color.chart_deep_sleep_light);
+
+        akActivity.color = AK_ACTIVITY_COLOR;
+        akLightSleep.color = AK_LIGHT_SLEEP_COLOR;
+        akDeepSleep.color = AK_DEEP_SLEEP_COLOR;
+    }
+
     private void setStartDate(Date date) {
         getHost().setStartDate(date);
     }
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityKind.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityKind.java
index 17fa1d22..3314b4f7 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityKind.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/ActivityKind.java
@@ -9,6 +9,7 @@ public class ActivityKind {
     public static final int TYPE_ACTIVITY = 1;
     public static final int TYPE_LIGHT_SLEEP = 2;
     public static final int TYPE_DEEP_SLEEP = 4;
+
     public static final int TYPE_SLEEP = TYPE_LIGHT_SLEEP | TYPE_DEEP_SLEEP;
     public static final int TYPE_ALL = TYPE_ACTIVITY | TYPE_SLEEP;
 
diff --git a/app/src/main/res/values-v21/styles.xml b/app/src/main/res/values-v21/styles.xml
index 61c6b4ca..dfd096b5 100644
--- a/app/src/main/res/values-v21/styles.xml
+++ b/app/src/main/res/values-v21/styles.xml
@@ -5,11 +5,25 @@
         <item name="android:colorPrimaryDark">@color/primarydark_light</item>
         <item name="android:colorAccent">@color/accent</item>
         <item name="android:textColor">@color/primary_text_default_material_light</item>
+
+        <!-- unfortunately it doesn't work this way :( -->
+        <!--
+        <item name="chart_deep_sleep">@color/chart_deep_sleep_light</item>
+        <item name="chart_light_sleep">@color/chart_light_sleep_light</item>
+        <item name="chart_activity">@color/chart_activity_light</item>
+        -->
     </style>
     <style name="GadgetbridgeThemeDark" parent="@android:style/Theme.Material">
         <item name="android:colorPrimary">@color/primary_dark</item>
         <item name="android:colorPrimaryDark">@color/primarydark_dark</item>
         <item name="android:colorAccent">@color/accent</item>
         <item name="android:textColor">@color/primary_text_default_material_dark</item>
+
+        <!-- unfortunately it doesn't work this way :( -->
+        <!--
+        <item name="chart_deep_sleep">@color/chart_deep_sleep_dark</item>
+        <item name="chart_light_sleep">@color/chart_light_sleep_dark</item>
+        <item name="chart_activity">@color/chart_activity_dark</item>
+        -->
     </style>
 </resources>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index d81fa9db..340861c2 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -10,4 +10,14 @@
     <color name="primarytext" type="color">#ff000000</color>
     <color name="secondarytext" type="color">#ff808080</color>
     <color name="divider">#1f000000</color>
+
+    <color name="chart_deep_sleep_light" type="color">#0071b7</color>
+    <color name="chart_deep_sleep_dark" type="color">#4c5aff</color>
+
+    <color name="chart_light_sleep_light" type="color">#46acea</color>
+    <color name="chart_light_sleep_dark" type="color">#b6bfff</color>
+
+    <color name="chart_activity_light" type="color">#60bd6d</color>
+    <color name="chart_activity_dark" type="color">#59b22c</color>
+
 </resources>
\ No newline at end of file