Start with the finishes that will stay
Place paving samples near the siding, brick, stone and doors that frame the patio. Decide which existing feature should lead the color direction. A sample viewed on its own can feel different beside the house.
Give the field and border different jobs
The field creates the main visual surface. A border can define the edge or connect the patio to a walk or step. Contrast is a choice, not a requirement; compare a restrained combination with a more visible edge before deciding.
Judge the pattern at a useful scale
Look at a larger layout or product example so the repeat and joint pattern are understandable. Consider the patio shape, the direction of the house and the furniture. Several small samples do not show the effect of an entire patterned surface.
Keep a record of the final selection
Record the specific product, color, pattern and border in the current proposal. Include the agreed transitions to existing work. Bring your preferred palette to Landscape Charlie with photos of the house and outdoor finishes you want to preserve.