Web Development is not always about the codes but also web designing
1. Color theory helps us choose the color combination to help our website look beautiful. "Analogous Colors" use 2 adjacent colors in the color wheel. They look good on texts. "Complementary Colors" use 2 opposite colors in the color wheel. They look good on icons.
2. Typography gives our website professionalism. Don't use Comic Sans or other unreadable/corny fonts for website
3. UI tips Have more alignment in text throughout the website. Also have ample of white spaces.