diff --git a/project/example/ble/ble_peripheral/app/src/Mode.c b/project/example/ble/ble_peripheral/app/src/Mode.c
index dc3fc30..0c6c0a9 100644
--- a/project/example/ble/ble_peripheral/app/src/Mode.c
+++ b/project/example/ble/ble_peripheral/app/src/Mode.c
@@ -19,6 +19,8 @@ uint8_t Mode=mode0;            //mode0 1 2 3 4
 uint8_t Speed=5;  //速度
 uint8_t direction = 1; // 呼吸灯的亮度变化方向，1表示增加，0表示减小
 
+#define THREE_COLOR_SINGLE_JOIN_LEVEL 41U
+
 uint8_t choose_mode_falsg=0;  //模式值
 uint8_t choose_mode_bh=0;   //模式变化
 static uint8_t mode_entry_initialized;
@@ -230,11 +232,11 @@ void Mode1(){ //
 					  breathespeed_flag=0;
 						W_PWM -= 1;
 						C_PWM = 0;
-						if (W_PWM <= 1) {
+						if (W_PWM <= THREE_COLOR_SINGLE_JOIN_LEVEL) {
 								direction = 2;
 								driveMode=0;
 								W_PWM = 1;
-								C_PWM = 0;
+								C_PWM = 1;
 						}
 						break;
 				case 2:
@@ -254,8 +256,8 @@ void Mode1(){ //
 						if (W_PWM <=1) {
 								driveMode=2;
 								direction = 4;
-								W_PWM = 1;
-								C_PWM = 1;
+								W_PWM = 0;
+								C_PWM = THREE_COLOR_SINGLE_JOIN_LEVEL;
 						}
 						break;
 				case 4:
@@ -272,11 +274,11 @@ void Mode1(){ //
 					  breathespeed_flag=0;
 						W_PWM = 0;
 						C_PWM -= 1;
-						if (C_PWM <=1){
+						if (C_PWM <= THREE_COLOR_SINGLE_JOIN_LEVEL){
 								direction = 0;
 								driveMode=1;
-								W_PWM = 1;
-								C_PWM = 1;
+								W_PWM = THREE_COLOR_SINGLE_JOIN_LEVEL;
+								C_PWM = 0;
 						}
 
 						break;
diff --git a/project/example/ble/ble_peripheral/app/src/light_transition.c b/project/example/ble/ble_peripheral/app/src/light_transition.c
index 0d263b5..a793aad 100644
--- a/project/example/ble/ble_peripheral/app/src/light_transition.c
+++ b/project/example/ble/ble_peripheral/app/src/light_transition.c
@@ -13,6 +13,7 @@ volatile uint32_t Light_Transition_C_Output_Q12;
 #define LIGHT_OUTPUT_SCALE 1000U
 #define BREATH_MIN_OUTPUT (LIGHT_OUTPUT_SCALE / 100U)
 #define DUAL_MIN_STABLE_CHANNEL_OUTPUT 102U
+#define THREE_COLOR_JOIN_OUTPUT (2U * DUAL_MIN_STABLE_CHANNEL_OUTPUT)
 #define POWER_FADE_Q12_MAX 4096U
 #define POWER_FADE_ON_TICKS 140U
 #define POWER_FADE_OFF_TICKS 160U
@@ -353,6 +354,22 @@ void Light_Transition_Task(void)
                         (LIGHT_OUTPUT_SCALE / 100U) + 2048U) >> 12);
     }
 
+    /*
+     * The three-color breathing effect joins a single-color phase to a
+     * 50:50 phase. Keep the single-color side at the same physical minimum
+     * as the stable dual-color side, otherwise the first mixed step jumps
+     * from about 10/1000 to at least 204/1000.
+     */
+    if(Mode == mode1 && choose_mode_falsg == 5U)
+    {
+        if(W_PWM != 0U && C_PWM == 0U &&
+           target_w < THREE_COLOR_JOIN_OUTPUT)
+            target_w = THREE_COLOR_JOIN_OUTPUT;
+        else if(C_PWM != 0U && W_PWM == 0U &&
+                target_c < THREE_COLOR_JOIN_OUTPUT)
+            target_c = THREE_COLOR_JOIN_OUTPUT;
+    }
+
     /*
      * Keep the weaker mixed-light direction at the measured stable threshold.
      * Raise the combined output only when the requested W:C ratio needs it.