Yes, you can absolutely wear red in Thailand in 2026 without any legal issues or widespread social backlash. While the color red was famously associated with the "Red Shirt" political protesters during the civil unrest of the late 2000s and early 2010s, those specific tensions have largely moved into the past for the average visitor. Today, red is viewed much more through its traditional lens—as a symbol of good luck and prosperity, especially within the Thai-Chinese community during Lunar New Year. However, it is a vital cultural tip to be mindful of where you wear it; when visiting the Grand Palace or high-status royal temples, the color of your clothes matters less than the modesty of the cut (shoulders and knees must be covered). In 2026, Thailand is a vibrant, color-loving nation, and you will see locals wearing every color of the rainbow. The only time you might want to be subtle with "political" colors is during actual election periods or demonstrations, but for standard sightseeing, your red shirt is perfectly safe and culturally acceptable.