diff --git a/Install_CorridorKey_Linux_Mac.sh b/Install_CorridorKey_Linux_Mac.sh
index ce1699d37..26ae09759 100755
--- a/Install_CorridorKey_Linux_Mac.sh
+++ b/Install_CorridorKey_Linux_Mac.sh
@@ -84,6 +84,24 @@ else
     fi
 fi
 
+# CorridorKeyBlue (dedicated blue-screen weights). Optional: the green
+# checkpoint above is the primary install. If the blue download fails — repo
+# missing, network blip, etc. — we just skip it. The Python runtime
+# (_ensure_torch_checkpoint) will retry the download on first --screen-color
+# blue use, so a failure here only costs the user a one-time 300 MB pull at
+# render time instead of bricking the install.
+BLUE_SAFETENSORS_PATH="$CKPT_DIR/CorridorKeyBlue_1.0.safetensors"
+HF_BLUE_BASE="https://huggingface.co/nikopueringer/CorridorKeyBlue_1.0/resolve/main"
+if [ -f "$BLUE_SAFETENSORS_PATH" ]; then
+    echo "CorridorKeyBlue checkpoint already exists!"
+else
+    echo "Downloading CorridorKeyBlue_1.0.safetensors (blue-screen model)..."
+    if ! curl -L --fail -o "$BLUE_SAFETENSORS_PATH" "$HF_BLUE_BASE/CorridorKeyBlue_1.0.safetensors"; then
+        echo "[INFO] Blue checkpoint not downloaded — it will fetch automatically the first time you run with --screen-color blue."
+        rm -f "$BLUE_SAFETENSORS_PATH"
+    fi
+fi
+
 echo ""
 echo "==================================================="
 echo "  Setup Complete! You are ready to key!"
diff --git a/Install_CorridorKey_Windows.bat b/Install_CorridorKey_Windows.bat
index 7708d5053..cc584ad57 100644
--- a/Install_CorridorKey_Windows.bat
+++ b/Install_CorridorKey_Windows.bat
@@ -70,6 +70,23 @@ if exist "%SAFETENSORS_PATH%" (
     )
 )
 
+REM CorridorKeyBlue (dedicated blue-screen weights). Optional download:
+REM if it fails (repo missing, network blip, etc.) the Python runtime will
+REM retry on first --screen-color blue use, so failure here is non-fatal --
+REM users keying green plates aren't blocked by an unrelated download.
+set "BLUE_SAFETENSORS_PATH=%CKPT_DIR%\CorridorKeyBlue_1.0.safetensors"
+set "HF_BLUE_BASE=https://huggingface.co/nikopueringer/CorridorKeyBlue_1.0/resolve/main"
+if exist "%BLUE_SAFETENSORS_PATH%" (
+    echo CorridorKeyBlue checkpoint already exists!
+) else (
+    echo Downloading CorridorKeyBlue_1.0.safetensors ^(blue-screen model^)...
+    curl.exe -L --fail -o "%BLUE_SAFETENSORS_PATH%" "%HF_BLUE_BASE%/CorridorKeyBlue_1.0.safetensors"
+    if errorlevel 1 (
+        echo [INFO] Blue checkpoint not downloaded -- it will fetch automatically the first time you run with --screen-color blue.
+        if exist "%BLUE_SAFETENSORS_PATH%" del "%BLUE_SAFETENSORS_PATH%"
+    )
+)
+
 echo.
 echo ===================================================
 echo   Setup Complete! You are ready to key!