She's wearing a pop of red with these awesome cropped pants ... and even though the rest of her pieces are more understated, they still have great visual interest: the shirt has tiny polka dots and the smoking slippers she's wearing have a pattern to them that brings all the colors together.
(All product images courtesy of retailers as follows)
(1) Polka dot chambray shirt
(2) Faux leather tote
(3) Plaid loafers
(4) Red skinny ankle pants
Girl ... you're wearing the PERFECT outfit for the transition from summer to fall. SNAPS.