My first scarf was blue and white. I found that changing colors helped me to see mistakes more easily than just one color but variegated yarn made it harder. Fortunately we can all do things whatever way we do them and there are no knitting police to come and take us away!
Shoot. Now I have, They're coming to take me away he he ha ha ho ho to the funny farm.... in my head.
I should never overestimate my basic arithmetic skills.