What are the basic requirements that we wanted to create a user friendly designs with a good color combination?

1) Keep it Simple. Avoid unnecessary elements.

2) Create Consistency.

3) Be purposeful. Consider the relationships between the elements and the design structure.

4) Strategical usage of color and texture.

5) Using typography to create hierarchy and clarity. Consider how to use different typefaces to increase legibility and readability.

6) Communicate; don't frustrate.