Originally Posted by H2O_Doc

After a little but of reading it seemed less nonsensical. The different DOT fluids are different colors so they can be easily distinguished from one another. In industrial or shop settings, it provides a little added safeguard against making an error. Adding blue coloring was always agains the regs, it just took a while for someone to enforce the standard.

At least you won't wonder anymore if it was brake fluid or smurf cum you put into your car.