Turquoise and red contrast in this memory box for a bright sharp effect. A gold frame warms up the design and glows warmly against the metal pieces. I like the way the green stamp on the back of one postcard is reflected in the turquoises and blue greens on the front of the Muskoka Lakes postcard. www.artclasscurator.com/principles-of-design-examples/#:~:text=As%20a%20principle%20of%20art,and%20drama%20in%20an%20artwork I contrasted the rectangular shapes with the circular shapes and holes in the metal pieces, 10 ¼”x 12 ¼”.