I'm also partially colorblind, and I tend to send pictures of the strip w/ color legend to a few people to confirm the reading for me.
This page should tell you anything you need to know about the effects of your brewing water.
https://sites.google.com/site/brunwater/water-knowledge
As for the accuracy, I just check it against the free spreadsheet on the website I linked. So far so good, brun'water has been just as great of an asset for me as the BIABacus from this site.
This site recommends the paper DuoTest strips on Amazon, which is what I use. I believe Martin also recommends some on the page I linked.