Learn How to Change Chat Theme in Instagram with simple step-by-step instructions. Instagram lets users personalise their DMs by selecting different colours, gradients, and themed backgrounds. To change a theme, open Instagram, go to Direct Messages, select a conversation, tap the person’s name, and choose the Theme option. Users can also explore AI-generated themes where the feature is available. If the theme option is missing, updating Instagram, clearing the app cache, restarting the device, or logging out and back in may help. This guide makes Instagram chat customisation easy for everyday users.