ColourPop True Blue is a cool blue with a matte finish that is limited edition and retails for $4.50. In comparison, NARS L'Amour, Toujours L'Amour #10 is a cool blue with a matte finish that is discontinued and retails for $25.00.
NARS L'Amour, Toujours L'Amour #10 is 80% similar — it is darker, warmer.