In a small kitchen with a Spanish hacienda theme, arched doorways can add a touch of elegance and sophistication. The doorways can be framed with decorative tiles or painted in a contrasting color to create a focal point. The arched shape not only adds visual interest but also creates a sense of flow and continuity throughout the space. To complement the arched doorways, other elements of the kitchen can also feature curved lines, such as the countertops or light fixtures. This creates a cohesive and harmonious look, reminiscent of the architectural details found in Spanish-style homes. Overall, arched doorways can elevate the design of a small kitchen and bring the Spanish hacienda theme to life.