Sydney Grace Comforting Light is a warm duochrome with a metallic finish that is permanent and retails for $6.00. In comparison, Natasha Denona Calypso Blue (05M) is a warm duochrome with a sparkle finish that is permanent in palette and retails for $29.00.
Natasha Denona Calypso Blue (05M) is 80% similar — it is darker, warmer.
