It is generally not recommended to wear red on a safari, though the reason is more about "visibility" and "insects" than inciting animal rage. Most large cats, like lions, are dichromats and cannot distinguish red from green; to them, a red shirt looks like a dark, high-contrast blob against the bush. However, red is a "conspicuous" color that stands out to other wildlife and can make you a target for biting insects like tsetse flies, which are attracted to dark or vibrant colors. Furthermore, red is the traditional color of the Maasai "Shuka" in East Africa; wearing it as a tourist can sometimes be seen as culturally insensitive or confusing to the animals who associate that color with a specific human group. To blend in and stay cool, you should stick to the "Big Four" safari colors: khaki, olive, tan, and muted brown. These colors help you "disappear" into the landscape, ensuring the animals stay relaxed and you get a better, more natural viewing experience without attracting unwanted attention.