At a glance it's supposed to be similar to Tru-oil? Tru-oil definitely imparts a slight amber tint that gets stronger over time. For most colors that's generally not a problem, and it's beneficial for more natural colors. Blue is just an oddball color for finishing, and blue dye tends to be loaded with asterisks (i.e., a brand of dyes might advertise lightfastness, but note an exception that the blue dye is less lightfast).

I settled on a water-based poly because dries completely clear and should stay that way.