As someone who has dealt extensively with the color diet over the years, I can say unequivocally that you shouldn't worry about screwing up. Linda herself said that stress and frustration were the biggest barriers to success with the color diet. I did a lot of research about the foods. There were some inconsistencies that Linda herself didn't catch!
The only time you have to restart the count of days is when you miss the daily color bath. Also, the 45, 54, 63 time limits are NOT ABSOLUTE! I know what Linda says but this hasn't proven true with my experience, nor with two other people I know who've done the color diet. If you're not done by the 63rd day, continue in 9-day increments until you've reached your ideal weight.
I can vouch for the validity of the color diet. It does work. Just follow the steps the best you can, don't obsess over any portion of the plan, and enjoy the process. I could go on and on, but if you need more info, you may email me at Tes7000@aol.com.