I don't know if it's my eyeballs or my lighting but the two lightest tans and the two whites which are technically different colors look *identical* while stitching. But the overall effect is pretty solid once the actual contrast colors have been set down!
So far, the techniques I've tried out so far including railroading and loop start- but after various trials, I'm settling on the loop start where the loop is made near the end rather than the middle. I'm still not sure I trust it.
#crossstitch