diff --git a/src/common/system/settings.h b/src/common/system/settings.h
index fd19ba7f5..e6f2e6591 100644
--- a/src/common/system/settings.h
+++ b/src/common/system/settings.h
@@ -103,7 +103,7 @@ static settings_s __default_settings = (settings_s){
     .enable_logging = false,
     .blue_light_state = false,
     .blue_light_level = 0,
-    .blue_light_rgb = 00000,
+    .blue_light_rgb = 8421504,
     .blue_light_time = "20:00",
     .blue_light_time_off = "08:00",
     .mainui_button_x = "",
diff --git a/src/tweaks/values.h b/src/tweaks/values.h
index fce4411b5..981b93f6c 100644
--- a/src/tweaks/values.h
+++ b/src/tweaks/values.h
@@ -60,34 +60,43 @@ int value_appShortcut(int button)
     return 0;
 }
 
-int value_blueLightLevel(void)
-{
-    int blueLightLevel = 0;
-    config_get("display/blueLightLevel", CONFIG_INT, &blueLightLevel);
-    return blueLightLevel;
-}
-
-int value_blueLightRGB(void)
-{
+int value_blueLightRGB(void) {
     int blueLightRGB = 0;
-    config_get("display/blueLightRGB", CONFIG_INT, &blueLightRGB);
+    if (!config_get("display/blueLightRGB", CONFIG_INT, &blueLightRGB)) {
+        blueLightRGB = settings.blue_light_rgb;
+        config_setNumber("display/blueLightRGB", blueLightRGB);
+    }
     return blueLightRGB;
 }
 
-int value_blueLightTimeOn(void)
-{
-    char blueLightTime[12];
+int value_blueLightLevel(void) {
+    int blueLightLevel = 0;
+    if (!config_get("display/blueLightLevel", CONFIG_INT, &blueLightLevel)) {
+        blueLightLevel = settings.blue_light_level;
+        config_setNumber("display/blueLightLevel", blueLightLevel);
+    }
+    value_blueLightRGB(); // also init a default rgb size
+    return blueLightLevel;
+}
+
+int value_blueLightTimeOn(void) {
+    char blueLightTime[12] = {0};
     int blueLightID = 0;
-    config_get("display/blueLightTime", CONFIG_STR, blueLightTime);
+    if (!config_get("display/blueLightTime", CONFIG_STR, blueLightTime)) {
+        strcpy(blueLightTime, settings.blue_light_time);
+        config_setString("display/blueLightTime", blueLightTime);
+    }
     blueLightID = formatter_timeStringToID(blueLightTime);
     return blueLightID;
 }
 
-int value_blueLightTimeOff(void)
-{
-    char blueLightTimeOff[12];
+int value_blueLightTimeOff(void) {
+    char blueLightTimeOff[12] = {0};
     int blueLightID = 0;
-    config_get("display/blueLightTimeOff", CONFIG_STR, blueLightTimeOff);
+    if (!config_get("display/blueLightTimeOff", CONFIG_STR, blueLightTimeOff)) {
+        strcpy(blueLightTimeOff, settings.blue_light_time_off);
+        config_setString("display/blueLightTimeOff", blueLightTimeOff);
+    }
     blueLightID = formatter_timeStringToID(blueLightTimeOff);
     return blueLightID;
 }
diff --git a/static/build/.tmp_update/script/blue_light.sh b/static/build/.tmp_update/script/blue_light.sh
index 0d65291a4..d189156d6 100644
--- a/static/build/.tmp_update/script/blue_light.sh
+++ b/static/build/.tmp_update/script/blue_light.sh
@@ -69,8 +69,17 @@ disable_blue_light_filter() {
 
 check_blf() {
     sync
-    blueLightTimeOn=$(cat /mnt/SDCARD/.tmp_update/config/display/blueLightTime)
-    blueLightTimeOff=$(cat /mnt/SDCARD/.tmp_update/config/display/blueLightTimeOff)
+
+    blueLightTimeOnFile="/mnt/SDCARD/.tmp_update/config/display/blueLightTime"
+    blueLightTimeOffFile="/mnt/SDCARD/.tmp_update/config/display/blueLightTimeOff"
+
+    if [ ! -f "$blueLightTimeOnFile" ] || [ ! -f "$blueLightTimeOffFile" ]; then
+        rm -f "$lockfile"
+        return
+    fi
+
+    blueLightTimeOn=$(cat "$blueLightTimeOnFile")
+    blueLightTimeOff=$(cat "$blueLightTimeOffFile")
 
     currentTime=$(date +"%H:%M")
     currentTimeMinutes=$(to_minutes_since_midnight "$currentTime")