|An 'happy accident' tip! I wanted to use a hem finish on a delicate knit. Using the same colour of thread in a 3-thread overlock on a print like this would have stuck out like a sore thumb (on a plain fabric I would have bought regular thread, threaded 3 bobbins and used them for serging).
Like quilters who use a soft neutral for blending, I figured grey or tan would work well. I used light in the loopers and a darker tan in the needle. Unfortunately I ran out of one of the lighter shades before I got to the hem finish, so I had to use the darker shade in the needle and one looper. Luckily, using the combination of light & dark threads in the loopers gave a blended colour that worked well as a hem finish!!