TToolumina

Toolumina Reference Libraries

A unified entry point for developer reference pages: color codes, regular expressions, cron schedules, Unix timestamps, MIME types, and JSON Schema keywords.

Reference modules

Toolumina currently publishes 1006 reference URLs. Each library is designed for quick lookup, copy-ready examples, and search-friendly technical explanations.

688 colors + 10 collectionsColor Code ReferenceLook up HEX, RGB, HSL, contrast, and color harmony values.50 regex patternsRegex Reference LibraryCopy tested regular expressions with examples and caveats.50 schedules + syntax guideCron Expression ReferenceFind Linux and Quartz cron expressions for common schedules.70 timestamp pagesUnix Timestamp ReferenceConvert notable Unix timestamps into UTC, ISO, and local context.100 MIME types + 8 categoriesMIME Type ReferenceCheck media types, extensions, Content-Type examples, and usage notes.22 JSON Schema keywordsJSON Schema LibraryCopy starter JSON Schema templates for common API objects.

Common starting points

Red Color CodesWarm UI colors, HEX values, RGB, HSL, and contrast context.Email RegexValidated examples, non-matches, language snippets, and caveats.Every 5 Minutes CronField breakdown, future UTC runs, platform examples, and operations notes.Timestamp PrecisionSeconds, milliseconds, microseconds, nanoseconds, and unit debugging.application/jsonContent-Type header, Accept examples, upload filtering, and common mistakes.JSON Schema typeValid and invalid examples for the foundational JSON Schema type keyword.