Some of you non knitters may be wondering just what it is I do. Well here are some articles to help you out:
This article explains what knitting is:
Knitting is a good hobby. Here is an article explaining hobbies:
This article describes a commonly knitted item:
This article will help you decide if your colour choices are appropriate or not. If not, it could be an actual physical problem, not just bad taste!
Clearly if you have problems accurately viewing colours, either genetically or because of viewing the last article, you should consider a new hobby. Perhaps a musical instrument?