diff --git a/docs/bluetooth_design.md b/docs/bluetooth_design.md
index 9c5cf42..3ceb492 100644
--- a/docs/bluetooth_design.md
+++ b/docs/bluetooth_design.md
@@ -148,13 +148,13 @@ on both the Hosted Master and co-processor.
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant ble as NimBLE Host Bluetooth Stack
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -174,13 +174,13 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant ble as NimBLE Host Bluetooth Stack
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -204,13 +204,13 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant ble as NimBLE Host Bluetooth Stack
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -244,12 +244,12 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant ble as NimBLE Host Bluetooth Stack
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
@@ -268,12 +268,12 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant ble as NimBLE Host Bluetooth Stack
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
@@ -290,12 +290,12 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant ble as NimBLE Host Bluetooth Stack
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
@@ -342,13 +342,13 @@ on both the Hosted Master and Co-processor.
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant bt as Host Application
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -364,13 +364,13 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant bt as BlueDroid Host Bluetooth Stack
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -394,13 +394,13 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Hosted Master
+    box rgb(128, 128, 128) Hosted Master
     participant bt as BlueDroid Host Bluetooth Stack
     participant vhci as VHCI Driver
     participant master as SPI/SDIO Interface
     end
 
-    box Grey Hosted Co-processor
+    box rgb(128, 128, 128) Hosted Co-processor
     participant sinterface as SPI/SDIO Interface
     participant slave as Bluetooth Controller
     end
@@ -438,12 +438,12 @@ that do the following are required:
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant bt as Host Application
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
@@ -458,12 +458,12 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant bt as BlueDroid Host Bluetooth Stack
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
@@ -479,12 +479,12 @@ sequenceDiagram
 
 ```mermaid
 sequenceDiagram
-    box Grey Master
+    box rgb(128, 128, 128) Master
     participant bt as BlueDroid Host Bluetooth Stack
     participant huart as UART Driver
     end
 
-    box Grey Co-processor
+    box rgb(128, 128, 128) Co-processor
     participant slave as Bluetooth Controller with UART Interface
     end
 
diff --git a/docs/wifi_design.md b/docs/wifi_design.md
index 6dd8a65..a1cd094 100644
--- a/docs/wifi_design.md
+++ b/docs/wifi_design.md
@@ -9,7 +9,7 @@ response is returned to the application.
 
 ```mermaid
 sequenceDiagram
-    box Grey Host With Native WI-Fi
+    box rgb(128, 128, 128) Host With Native WI-Fi
     participant app as Application
     participant api as ESP-IDF Wi-Fi Library
     participant wifi as Wi-Fi Hardware
@@ -35,14 +35,14 @@ encapsulates the data for transport.
 
 ```mermaid
 sequenceDiagram
-    box Grey Host with ESP-Hosted
+    box rgb(128, 128, 128) Host with ESP-Hosted
     participant app as Application
     participant remote as Wi-Fi Remote
     participant hostedh as ESP-Hosted
     participant transporth as Host Transport
     end
 
-    box SlateGrey Slave ESP-Hosted
+    box rgb(128, 128, 128) Slave ESP-Hosted
     participant transports as Slave Transport
     participant hosteds as Slave Hosted
     participant api as ESP-IDF Wi-Fi Library
@@ -60,11 +60,11 @@ sequenceDiagram
     transports ->> hosteds : 
     Note over hosteds : remove Hosted header
     hosteds ->> api : esp_wifi_xxx()
-    api ->> wifi : Wi-Fi command
     hosteds ->> wifi : Network Data
+    api ->> wifi : Wi-Fi command or Data
     Note over wifi: Do Wi-Fi action
+    wifi -->> api : Wi-Fi response or Data
     wifi -->> hosteds : Network Data
-    wifi -->> api : Wi-Fi response
     api -->> hosteds : Response
     Note over hosteds : add Hosted header
     hosteds -->> transports : 
@@ -77,7 +77,3 @@ sequenceDiagram
     hostedh -->> remote : Wi-Fi Command response
     remote -->> app : Response
 ```
-
-
-
-