Technology advancement has changed shopping activities from offline to online (O2O). Businesses must take advantage of digital technology to market their products by creating attractive visual advertising to acquire their consumers. This study empirically investigates purchase behavior and evaluation of Instagram content ads from the visual elements of advertising (color, product image, design, and typography). A total of 496 online consumers participated in the survey. The findings further show that, except for color, all visual elements of advertising directly affect consumer attitude. Our results also confirm that actual purchases are formed by attitudes and purchase intentions. Theoretically, this study furthers the literature on consumer behavior, social media advertisement, and digital marketing. Moreover, it provides practical insights into designing attractive advertisement content on Instagram, which benefits marketers and content/graphic designers.