I think it's blue just to better illustrate the 2 pieces of the bottles and where to hold the cap against the tip. It took me a couple tries to get the hang of it but it doesn't take much at all, its more a technique of pressing and turning than strength. I do see how it would be difficult for some I also have this nifty right hand full of plates and screws that keeps me from making a fully closed fist even and doesn't do much but cause me trouble. Normally I have to get my kid to open jars and stuff lol
thats what i figured, but didn't want to assume.
when i get that can opener thingy, i will report back. i just stumbled across it will looking at other stuff.