I haven't done 23andme, nor have I used nutrahacker or geneticgenie, but if I had to guess, I'd think read means both genes mutated (homozygous mutation), and yellow means one of the two genes are mutated (heterozygous mutation).
For interpretation of methylation genes, join
knowyourgenetics.com for free and plug in your methylation results.
Then, read
www.dramyyasko.com/wp-content/files_flutter/1327512160_9_1_1_8_pdf_02_file.pdf to find out how to properly implement the recommendations from knowyourgenetics.com.