Quite a few JM's will generate early spring color like that. But spring is only one of three color phases the tree will experience during the season. You really need to evaluate all three stages (spring, midseason, fall) before being able to come to even a semi-conclusive ID.

Most likely you saw a Japanese maple cultivar like Acer palmatum ‘Coral Pink’, ‘Shindeshojo’, or possibly ‘Spring Delight’ — all known for their apricot-pink to coral-red spring foliage. In Seattle’s 8b climate, these colors show up especially vibrant in early spring before softening into green or red tones as the season goes on. If it looked more pastel or peach-toned than red, it was probably ‘Coral Pink’ or ‘Spring Delight.’ To confirm, try checking local specialty nurseries — many carry these cultivars and can help ID what’s common in your area.

You can also check for info from a large Oregon grower. Don Schmidt. Don Schmidt Nursery

Having grown and sold JM's for many years, I would not consider any of the trees previously listed as having "apricot-pink" spring coloring. Shindeshojo is described as "cherry red"; Spring Delight is green with red tips and Coral Pink starts the season a very pale blush pink, almost white.

Ideally, you want to visit a good local JM supplier in early spring as these are just leafing out to find the coloring you like. IMO, much closer to the apricot pink coloring is Corallinum, Beni Maiko or Katsura but there are others.

Don Schmidt is a wholesale nursery and not open to the public.