Hex signs originated as six-pointed rosettes called "sechs signs" in Pennsylvania German. They featured colorful geometric designs and symbols like doves, lilies and hearts. Hex signs began as religious symbols on barns but are now used decoratively. Common symbols and their meanings include rosettes for good luck, tulips for faith, and hearts for love. Colors also carry symbolic meanings to ward off illness. Today, people make their own hex signs following basic design principles of symmetry.