It is important that everyone has an equal opportunity to reap the benefits from your valuable content. The U.S. Census reports that 1 in 5 people have a disability. In order to do so you should follow the guidelines created by the governing bodies of the web. Making your website accessible can be simple or daunting task. It depends on the size and complexity of your website. It is much easier to consider accessibility at the beginning versus fixing it later.
Making your website accessible happens at the design and code level. At the design level, the designer thinks about usability and ease of use. He/she ask questions like how easy is the content to read, how complicated are the interactions or does the flow make sense. A coder worries more about tagging elements for screen readers, keyboard inputs, or even adding transcripts to video.
Section 508 - Official website for Section 508 of the US Rehabilitation Act.
WCAG 2.0 Guidelines - Success criteria that is written as testable statements that are not technology-specific.
Bootstrap accessibility - Bootstrap follows common web standards and, with minimal extra effort, can be used to create sites that are accessible.
Web Accessibility Checker - A web accessibility evalution tool designed to help web developers developers ensure their content is accessible.
Web Contrast Checker - A web accessibility tool that measures the contrast ratio between foreground and background colors.