Gmail is one of the largest email service providers in the world. It has expanded its services to different needs of the internet over time and gives many features in its email service. Such as controlled spam, unlimited storage space, chat, labs etc. In Gmail you can set your text styling, color, and size as per your preference by setting defaults in that manner. It reduces chances of any corrections in formatting if the defaults are set as per your preferences.
Follow this step by step tutorial to learn How to define fonts, font color and font size in Gmail.