The phrase "to match any decor" means that something, like furniture or decorations, can be coordinated or chosen in a way that it complements or goes well with any style or theme of room design. Full definition
My kids love their new bulletin boards, since they each picked out their own fabrics, and the boards match the decor of their bedrooms! (momhomeguide.com)
That's good because you'll want something that matches your decor perfectly since this substantial piece will be around for many years. (babylist.com)