Another common problem that afflicts some visitors is the incorrect use of colours on the Website.
Your images, graphics, animations, and text especially should be viewable and readable by all users irrespective of the browser or resolution setting.
Many visitors would enter your Website with high colour settings; there are still quite a few web users whose computers have a setting of 256 colors.
Ensure that your Website does not have any dithering issues for visitors whose monitors have different colour settings. Thus, your font and background colours should be in sufficient contrast so that all your visitors can easily read your web pages irrespective of their browser or colour settings.
Instead of directly using the colour names, ensure that you use the matching hexadecimal codes to allocate the colours on your site.