HTML Specifications and Codes

Here is the information about HTML specifications currently available:

Pages about specs:

Spec Files
HTML 5 Cheat Sheet (PDF), courtesy of Matt Banner, OnBlastBlog.com
XHTML 1.0 Transitional Reference: a complete reference for the official XHTML 1.0 Transitional specification.
XHTML 1.0 Strict Reference: a complete reference for the official XHTML 1.0 Strict specification.
HTML 4.01 Transitional Reference: a complete reference for the official HTML 4.01 Transitional specification.
HTML 4.01 Strict Reference: a complete reference for the official HTML 4.01 Strict specification.
HTML 3.2 Reference: a complete reference for the official HTML 3.2 specification. This hyperlinked set of pages presents the elements using the the official Document Type Definition (DTD) for HTML 3.2. Although HTML 3.2 is an older standard for HTML, it is widely supported in many of the browsers in operation today. HTML 3.2 gives you a way to implement HTML simply and accurately without the complexity and costs of the higher levels of HTML.
HTML 2.0 Reference: This is a hypertext reference presenting the HTML 2 language based on the Document Type Definition (DTD) specificied in RFC1866, Hypertext Markup Language 2.0. This reference shows HTML 2.0 Level 2, with all recommended features, highlighting, and forms included. All deprecated features are excluded.
HTML Spec Summary, this is a tabular summary of many HTML elements and attributes, organized according to document component. Includes some descriptions of non-stanard HTML.
HTML Information, from W³C. This is the authoritative source for HTML information.
Style, from W³C. Use cascading style sheets (CSS) to specify how your Web pages look, separate from your implementation of the pages using HTML elements.
Validator, from W³C. Use this service to check your Web pages for compliance to HTML standards.

Pages about color:

Codes, Entities, &Etc.