Performance Standard 2.1: Demonstrate Understanding of Color Theory as it Applies to Web Design and Development. 2.1.1 Explore Web Design Fundamentals. 2.1.2 Explore Design Theory. 2.1.3 Understand graphics file formats (vector versus raster). 2.1.4 Investigate graphics editors. 2.1.5 Understand computer color basics. 2.1.6 Control color properties with CSS.