diff --git a/project/example/ble/ble_peripheral/app/src/bridge_pwm.c b/project/example/ble/ble_peripheral/app/src/bridge_pwm.c
index 37c6483..aa7d929 100644
--- a/project/example/ble/ble_peripheral/app/src/bridge_pwm.c
+++ b/project/example/ble/ble_peripheral/app/src/bridge_pwm.c
@@ -18,8 +18,6 @@
  * The available OFF time is distributed around both direction changes and
  * each W/C transition retains at least 25 us protection.
  * Normal dual-color output produces one pulse per color per frame (2 kHz).
- * Low-level three-color breathing keeps 50 us pulses but density-modulates
- * them across frames so the average output can fade below that pulse width.
  */
 #define BRIDGE_PWM_SCALE          1000U
 #define BRIDGE_PWM_PERIOD         6U
@@ -28,11 +26,8 @@
 #define BRIDGE_DEADTIME_US        25U
 #define BRIDGE_DUAL_ACTIVE_US     450U
 #define BRIDGE_MIN_DUAL_PULSE_US  1U
-#define BRIDGE_TRICOLOR_PDM_PULSE_US 50U
 #define BRIDGE_TIMER_TICKS_PER_US 16U
 #define BRIDGE_PDM_THRESHOLD      (BRIDGE_MIX_SCALE * 4096UL)
-#define BRIDGE_TRICOLOR_PDM_THRESHOLD \
-    (BRIDGE_TRICOLOR_PDM_PULSE_US * BRIDGE_PDM_THRESHOLD)
 
 #define BRIDGE_GPIO_PORT          0U
 #define BRIDGE_GPIO_MASK          ((1UL << IO_PWM_W) | (1UL << IO_PWM_C))
@@ -388,46 +383,6 @@ __RAM_CODE void Bridge_Service_1ms(void)
         goto dual_output_ready;
     }
 
-    /*
-     * The low part of the three-color breathing effect cannot use short
-     * continuous pulses reliably. Emit verified 50 us pulses and vary their
-     * density across the fixed 2 kHz frames instead. Apply this to both the
-     * mixed section and each single-color tail, so no color disappears early
-     * when its hardware-PWM pulse becomes too narrow to light the LEDs.
-     */
-    if (deviceStatus != POWEROFF &&
-        Mode == mode1 && choose_mode_falsg == 5U &&
-        (w_mix != 0U || c_mix != 0U)) {
-        /*
-         * Follow the smoothed physical output rather than the next logical
-         * target. This lets the old color reach zero before the wait state
-         * starts the next color.
-         */
-        total_on_us = (w_mix != 0U && c_mix != 0U)
-                    ? BRIDGE_DUAL_ACTIVE_US : BRIDGE_FRAME_US;
-        pdm_w_step = total_on_us * ((uint32_t)w_mix << 12);
-        pdm_c_step = total_on_us * ((uint32_t)c_mix << 12);
-
-        if (pdm_w_step < BRIDGE_TRICOLOR_PDM_THRESHOLD &&
-            pdm_c_step < BRIDGE_TRICOLOR_PDM_THRESHOLD) {
-            next_w_us = BRIDGE_TRICOLOR_PDM_PULSE_US;
-            next_c_us = BRIDGE_TRICOLOR_PDM_PULSE_US;
-            total_off_us =
-                BRIDGE_FRAME_US -
-                (2U * BRIDGE_TRICOLOR_PDM_PULSE_US);
-            next_wc_off_us = (uint16_t)(total_off_us / 2U);
-            next_cw_off_us =
-                (uint16_t)(total_off_us - next_wc_off_us);
-            next_pdm_w_step = pdm_w_step;
-            next_pdm_c_step = pdm_c_step;
-            next_pdm_threshold = BRIDGE_TRICOLOR_PDM_THRESHOLD;
-            next_pdm_enabled = 1U;
-            cached_w_mix = (uint16_t)w_mix;
-            cached_c_mix = (uint16_t)c_mix;
-            goto dual_output_ready;
-        }
-    }
-
     if (next_pdm_enabled) {
         cached_w_mix = 0xFFFFU;
         cached_c_mix = 0xFFFFU;
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 72aedb2..cbee8f6 100644
--- a/project/example/ble/ble_peripheral/app/src/light_transition.c
+++ b/project/example/ble/ble_peripheral/app/src/light_transition.c
@@ -13,8 +13,6 @@ 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_MIN_CHANNEL_OUTPUT 25U
-#define THREE_COLOR_MIN_SINGLE_OUTPUT 45U
 #define POWER_FADE_Q12_MAX 4096U
 #define POWER_FADE_ON_TICKS 140U
 #define POWER_FADE_OFF_TICKS 160U
@@ -355,29 +353,6 @@ void Light_Transition_Task(void)
                         (LIGHT_OUTPUT_SCALE / 100U) + 2048U) >> 12);
     }
 
-    /*
-     * Three-color breathing uses 50 us pulse-density modulation below the
-     * normal dual-color pulse range. Keep both sides of each color join at
-     * the same low physical on-time: 45/1000 of a 500 us single-color frame,
-     * or 25 + 25 over the 450 us dual-color active interval.
-     */
-    if(Mode == mode1 && choose_mode_falsg == 5U)
-    {
-        if(W_PWM != 0U && C_PWM == 0U &&
-           target_w < THREE_COLOR_MIN_SINGLE_OUTPUT)
-            target_w = THREE_COLOR_MIN_SINGLE_OUTPUT;
-        else if(C_PWM != 0U && W_PWM == 0U &&
-                target_c < THREE_COLOR_MIN_SINGLE_OUTPUT)
-            target_c = THREE_COLOR_MIN_SINGLE_OUTPUT;
-        else if(W_PWM != 0U && C_PWM != 0U)
-        {
-            if(target_w < THREE_COLOR_MIN_CHANNEL_OUTPUT)
-                target_w = THREE_COLOR_MIN_CHANNEL_OUTPUT;
-            if(target_c < THREE_COLOR_MIN_CHANNEL_OUTPUT)
-                target_c = THREE_COLOR_MIN_CHANNEL_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.