Graphic design of websites can be more conplex than what it seems. A designer must think about many facets besides making it look visually appealing.
The design of a website goes beyond than what it looks since it is interactive. Thus, an intuitive design that is intuitive and satisfies the business model ideal. As an experienced web designer, understanding the different intricacies is vital.
A designer also incorporates a color theme revolving around and including the brand colors. If a company has not formally stated their brand colors, usually a designer will assume the brand colors from the logo, if available, or look at all prior ads and customer communications to draw out a consistent theme.
Los Angeles graphic designers usually choose images that are consistent with the marketing strategy or like the company's target customers, if they include people.
These are just a few facets, however there are many, including a client's feature requests. Feel free to add any in the comments below.