This question involves personal aesthetics and preferences, so the answer to which is better, red or blue, is subjective and there is no definite answer. But from the fashion field, red and blue are very popular colors, suitable for many occasions. You can consider the following points to make a choice:

1. Personal preference: If you prefer red, then choosing red clothes will make you more confident and comfortable. Similarly, if you prefer blue, then choosing blue clothes will make you feel better.

2. Skin color: Red is suitable for people with fair skin, because it can give people a radiant feeling. Blue is suitable for people with yellow or dark skin because it can make the skin look softer.

3. Match other colors: If you plan to match red or blue clothes with other colors, you can consider other clothes or accessories that you already have in your personal closet. For example, blue can be matched with neutral colors such as white, gray and black, and red can be matched with neutral colors such as white, black and gray.

Context and occasion: If you are going to wear red or blue clothes for a morning run, you can consider the weather and temperature at that time. For example, red may be more prominent and eye-catching, suitable for going out for a morning run on a sunny day; Blue may be calm and low-key, suitable for going out for a morning run in the early morning or on cloudy days.

To sum up, red and blue are beautiful colors. You can choose according to your personal preference, skin color, collocation and occasion. I hope these suggestions are helpful to you.