One Step Correct One Step Correct Stila One Step Correct immediately improves skin tone, evens out your complexion and helps smooth fine lines for a flawless canvas. This multi-functional serum is supercharged with Stila's proprietary Youth Revival Bio-Available Mineral Complex to help hydrate, control oil, and diminish the appearance of pores and fine lines.. Green tone instantly neutralizes redness and conceals blemishes. Lavender tone counteracts sallow undertones for a vibrant, energized look. Peach tone brightens, illuminates and helps diminish the appearance of sun spots. 1 fl oz. STIL-WU37. S496010001. Created in 1994 by a top celebrity makeup artist, Stila is known for its modern, sophisticated, non-intimidating approach to beauty. The brand's innovative, multi-tasking formulas, eco-friendly packaging, and fashion-forward colors have cemented its place on must-have lists of top beauty editors around the world.