chrisgraham

diff --git a/FunctionRegistry.php b/FunctionRegistry.php
index 2e6eebd..67b0cdc 100644
--- a/FunctionRegistry.php
+++ b/FunctionRegistry.php
@@ -1399,17 +1399,17 @@ class ILess_FunctionRegistry
     public function screen(ILess_Node_Color $color1, ILess_Node_Color $color2)
     {
         /*
-        $rs1 = ILess_Math::substract('255', $color1->getRed(true));
-        $rs2 = ILess_Math::substract('255', $color2->getRed(true));