Is it normal if sweat has a red tinge after drinking Hibiscus tea (Karkadeh)?

Cyanidin and delphinidin, the two compounds that give Hibiscus tea its red color, can be excreted in the sweat. Since sweat is slightly acidic, it will be redish in color. If you want to experiment, collect a small amount of your sweat and add a small amount of sodium bicarbonate to it. The color should change to a blueish hue.