CSS named colors
Comprehensive guide to all 147 CSS color keywords, including their 142 named colors. List of all CSS Color Module Level 4 named colors. Includes hex, RGB, and HSL values.
Collection of publications tagged with standard.
Comprehensive guide to all 147 CSS color keywords, including their 142 named colors. List of all CSS Color Module Level 4 named colors. Includes hex, RGB, and HSL values.
Complete HTML entity reference list. Includes symbols, arrows, mathematical operators, and special characters in Unicode, hex, decimal, named entity, and CSS codes.
The concept of void elements in HTML and how they differ from self-closing tags in XML, XHTML, and SVG. Highlighting, syntax, and parsing differences.
List of all Hypertext Transfer Protocol (HTTP) response status codes, the standardized, three-digit messages from servers indicating the outcome of client requests.
Guide to RFC 3339 and IXDTF timestamp formats with syntax, examples, and format specifiers. Timestamp grammar, timestamp comparisons, and practical usage.
Learn what the Referrer Policy is, why it matters for privacy, and how you can control it using simple directives to stay compliant and protect user data.
Subresource Integrity (SRI) secures websites by validating external resources with cryptographic hashes. Learn how to implement SRI to protect users from tampered resources for their security.
List of ISO 3166-1 alpha-2 and Alpha-3 country codes, along with the corresponding country code top-level domain (ccTLD) and country phone dial code.
Complete list of ISO 639 language names (including native names) and their corresponding ISO 639-1 Alpha-2 language codes. For use in e.g. HTML lang and hreflang attribute values.
List of standard and custom Linux exit status codes. Numeric values returned by commands or scripts, indicating success, failure, or specific error conditions.
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