diff --git a/examples/webApps/bgColorLEDWEB/main.py b/examples/webApps/bgColorLEDWEB/main.py
index 121bb57b..af5446d1 100755
--- a/examples/webApps/bgColorLEDWEB/main.py
+++ b/examples/webApps/bgColorLEDWEB/main.py
@@ -37,9 +37,12 @@ def buttonHandler(dataIn) :
        setColor(red,green,blue)
  
 def setColor(r,g,b):
-    pwmWrite(19,b)
-    pwmWrite(20,r)
-    pwmWrite(21,g)
+    # LED values are comprised between 0 and 100(%).
+    # For hardware reasons, LEDs lit when pin is LOW (0V)
+    # This is why the value is inverted here : 100% - led value
+    pwmWrite(18,100-r)
+    pwmWrite(19,100-g)
+    pwmWrite(20,100-b)
  
     colorData = {}
     colorData["red"] = r
@@ -70,4 +73,4 @@ def potar() :
        time.sleep(0.05)
  
 def proportion(value,istart,istop,ostart,ostop) :
-       return float(ostart) + (float(ostop) - float(ostart)) * ((float(value) - float(istart)) / (float(istop) - float(istart)))
\ No newline at end of file
+       return float(ostart) + (float(ostop) - float(ostart)) * ((float(value) - float(istart)) / (float(istop) - float(istart)))