Soil pH

Tested the pH today, using a standard garden pH testing kit - given that we have clay soil and cabbages etc. grow quite well, was expecting it to be neutral or somewhat alkaline, and turns out this is the case:

Clearly came out as green - guessing pH somewhere in the 7-8 range - the pictures don't do a good job of representing the colours, it's quite dark green in real life. Guess this should not come as any surprise because the local water is pretty hard...