A proposal ring does not have to be blue.
Pastel pinks make for pretty and romantic engagement rings. Seen here is a round, unheat pastel pink sapphire, flanked by 4 pieces round diamonds set in a wave design with a heart-shape detailing on the cross-section. In 18K white gold.
Petite and dainty yet fuss-free, this design is evergreen which allows most of the attention to be focussed on the unheat pink sapphire.