What does Orange and green mean? Base on pink coloer, my guess would be that Orange is acid, green is neutral and blue is alkaline. You know, orangish yellow for acid ( ~ pH 4-5), blue alk ( ~ pH 9-10). and the mix (green) neutral( ~ pH 6-8).

All of that said, they are just guesses.

These home test kits are only moderately reliable - accuracy, specially when it comes to the soil nutrient content, can be a bit questionable. But they are not too bad for pH. Since your test failed to register at all, I'd have to assume there was something wrong in determining your reaction or the test kit is flawed (too old?). Don't you get multiple abilities to test in each kit? Try it again, following the directions exactly. If no reaction this time, I'd return it.

And yes, pink flowers would tend to indicate an alkaline condition. I'd expect your test would show in the light to mid green range.