diff --git a/libraries/AP_Notify/RGBLed.cpp b/libraries/AP_Notify/RGBLed.cpp
index 38aa64fb3a..2e75e38446 100644
--- a/libraries/AP_Notify/RGBLed.cpp
+++ b/libraries/AP_Notify/RGBLed.cpp
@@ -166,7 +166,7 @@ uint32_t RGBLed::get_colour_sequence(void) const
 uint32_t RGBLed::get_colour_sequence_traffic_light(void) const
 {
     if (AP_Notify::flags.initialising) {
-        return DEFINE_COLOUR_SEQUENCE(RED,GREEN,BLUE,RED,GREEN,BLUE,RED,GREEN,BLUE,OFF);
+        return DEFINE_COLOUR_SEQUENCE(RED,GREEN,BLUE,RED,GREEN,BLUE,RED,GREEN,BLUE,BLACK);
     }
 
     if (AP_Notify::flags.armed) {
@@ -175,14 +175,14 @@ uint32_t RGBLed::get_colour_sequence_traffic_light(void) const
 
     if (hal.util->safety_switch_state() != AP_HAL::Util::SAFETY_DISARMED) {
         if (!AP_Notify::flags.pre_arm_check) {
-            return DEFINE_COLOUR_SEQUENCE_ALTERNATE(YELLOW, OFF);
+            return DEFINE_COLOUR_SEQUENCE_ALTERNATE(YELLOW, BLACK);
         } else {
             return DEFINE_COLOUR_SEQUENCE_SLOW(YELLOW);
         }
     }
 
     if (!AP_Notify::flags.pre_arm_check) {
-        return DEFINE_COLOUR_SEQUENCE_ALTERNATE(GREEN, OFF);
+        return DEFINE_COLOUR_SEQUENCE_ALTERNATE(GREEN, BLACK);
     }
     return DEFINE_COLOUR_SEQUENCE_SLOW(GREEN);
 }
diff --git a/libraries/AP_Notify/RGBLed.h b/libraries/AP_Notify/RGBLed.h
index e525ad22d3..d72b7afe60 100644
--- a/libraries/AP_Notify/RGBLed.h
+++ b/libraries/AP_Notify/RGBLed.h
@@ -78,7 +78,7 @@ private:
     ((S0) << (0*3) | (S1) << (1*3) | (S2) << (2*3) | (S3) << (3*3) | (S4) << (4*3) | (S5) << (5*3) | (S6) << (6*3) | (S7) << (7*3) | (S8) << (8*3) | (S9) << (9*3))
 
 #define DEFINE_COLOUR_SEQUENCE_SLOW(colour)                       \
-    DEFINE_COLOUR_SEQUENCE(colour,colour,colour,colour,colour,OFF,OFF,OFF,OFF,OFF)
+    DEFINE_COLOUR_SEQUENCE(colour,colour,colour,colour,colour,BLACK,BLACK,BLACK,BLACK,BLACK)
 #define DEFINE_COLOUR_SEQUENCE_FAILSAFE(colour) \
     DEFINE_COLOUR_SEQUENCE(YELLOW,YELLOW,YELLOW,YELLOW,YELLOW,colour,colour,colour,colour,colour)
 #define DEFINE_COLOUR_SEQUENCE_SOLID(colour) \
@@ -86,7 +86,7 @@ private:
 #define DEFINE_COLOUR_SEQUENCE_ALTERNATE(colour1, colour2)                      \
     DEFINE_COLOUR_SEQUENCE(colour1,colour2,colour1,colour2,colour1,colour2,colour1,colour2,colour1,colour2)
 
-#define OFF    0
+#define BLACK  0
 #define BLUE   1
 #define GREEN  2
 #define RED    4
@@ -94,16 +94,16 @@ private:
 #define WHITE (RED|GREEN|BLUE)
 
     const uint32_t sequence_initialising = DEFINE_COLOUR_SEQUENCE_ALTERNATE(RED,BLUE);
-    const uint32_t sequence_trim_or_esc = DEFINE_COLOUR_SEQUENCE(RED,BLUE,GREEN,RED,BLUE,GREEN,RED,BLUE,GREEN,OFF);
+    const uint32_t sequence_trim_or_esc = DEFINE_COLOUR_SEQUENCE(RED,BLUE,GREEN,RED,BLUE,GREEN,RED,BLUE,GREEN,BLACK);
     const uint32_t sequence_failsafe_leak = DEFINE_COLOUR_SEQUENCE_FAILSAFE(WHITE);
     const uint32_t sequence_failsafe_ekf = DEFINE_COLOUR_SEQUENCE_FAILSAFE(RED);
     const uint32_t sequence_failsafe_gps_glitching = DEFINE_COLOUR_SEQUENCE_FAILSAFE(BLUE);
-    const uint32_t sequence_failsafe_radio_or_battery = DEFINE_COLOUR_SEQUENCE_FAILSAFE(OFF);
+    const uint32_t sequence_failsafe_radio_or_battery = DEFINE_COLOUR_SEQUENCE_FAILSAFE(BLACK);
 
     const uint32_t sequence_armed = DEFINE_COLOUR_SEQUENCE_SOLID(GREEN);
     const uint32_t sequence_armed_nogps = DEFINE_COLOUR_SEQUENCE_SOLID(BLUE);
-    const uint32_t sequence_prearm_failing = DEFINE_COLOUR_SEQUENCE(YELLOW,YELLOW,OFF,OFF,YELLOW,YELLOW,OFF,OFF,OFF,OFF);
-    const uint32_t sequence_disarmed_good_dgps = DEFINE_COLOUR_SEQUENCE_ALTERNATE(GREEN,OFF);
+    const uint32_t sequence_prearm_failing = DEFINE_COLOUR_SEQUENCE(YELLOW,YELLOW,BLACK,BLACK,YELLOW,YELLOW,BLACK,BLACK,BLACK,BLACK);
+    const uint32_t sequence_disarmed_good_dgps = DEFINE_COLOUR_SEQUENCE_ALTERNATE(GREEN,BLACK);
     const uint32_t sequence_disarmed_good_gps = DEFINE_COLOUR_SEQUENCE_SLOW(GREEN);
     const uint32_t sequence_disarmed_bad_gps = DEFINE_COLOUR_SEQUENCE_SLOW(BLUE);