Read the colour repeat
Lay a length beside the cloth and note how far each colour phase runs. A short repeat changes often within one motif, while a long repeat may colour an entire section before moving on.
Photograph or mark the order before cutting if you want several rows to flow in a similar direction. The skein alone can hide how the colours will look once stitched.
Use open designs first
Large waves, simple grids and spaced geometric repeats give each colour room to register. Small dense motifs can turn the transitions into visual noise.
If the pattern has a strong central line, use the variegation on the supporting rows and a solid shade for the main structure. This keeps the design readable while still adding movement.
Control the joins
Finish one working length before the colour shift becomes inconvenient, then begin the next length so the transition falls in a planned area. There is no need to force a full repeat into one needle load.
Make a sample in the same stitch length as the project. Longer stitches reveal more of each colour phase; shorter stitches can blend the changes into a quieter texture.