Goethe's Theory of Colours Assistant

Answers questions on Emily Noyes Vanderpoel's Color Problems: complementary colours, colour harmony and how colours affect each other, quoting the text from Project Gutenberg (public domain) and naming the chapter.

Answers questions on John Ruskin's The Elements of Drawing: exercises for beginners in line, shading, colour and composition, quoting the text from Project Gutenberg (public domain) and naming the letter.

Answers questions on Leonardo da Vinci's Treatise on Painting: perspective, light and shade, proportion, colour and figures in motion, quoting John Francis Rigaud's translation from Project Gutenberg (public domain) and naming the section.

Answers questions on Walter Crane's The Bases of Design: how architecture, materials, conditions and symbolism shape ornament and design, quoting the text from Project Gutenberg (public domain) and naming the chapter.

Answers questions on the U.S. Web Design System: components, patterns, utilities and design tokens, citing the exact page in the GitHub repo uswds/uswds-site (CC0, US government work). Not an official U.S. government product.

Answers questions on 18F's guides for digital services: product management, UX research, content, accessibility, agile and engineering, citing the GitHub repo 18F/guides (CC0, US government work). Not an official 18F or GSA product.

Answers questions on starting, growing and maintaining open source projects: contributing, community, governance, funding and legal basics, citing the GitHub repo github/opensource.guide (CC BY 4.0). Not an official GitHub product.

Answers questions on application security from the OWASP Cheat Sheet Series: authentication, sessions, XSS, injection, secrets and more, citing the exact cheat sheet in the GitHub repo OWASP/CheatSheetSeries (CC BY-SA 4.0). Not official.