It's important to consider how people will see your page using different equipment and software. You should also consider people with visual or hearing impairment.
Blind people use text synthesizers to convert visual text on the screen into spoken words.
People with poor eyesight have difficulty with fixed font sizes, contrast, light text on dark backgrounds, etc. Style Sheets offer some solution to style problems that plaque most Web pages. Change your browser setting for font type and size. Make a browser comparison test . Use an HTML testing service or software to test for errors.