Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add jeffreytse/grimoire-core --skill apply-color-theory-principlesgit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-color-theory-principles)<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-color-theory-principles"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-color-theory-principles/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-color-theory-principles"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-color-theory-principles.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.01094 |
| Opus 5 | $0.00016 | $0.00547 |
| Sonnet 5 | $0.00006 | $0.00219 |
| Haiku 4.5 | $0.00003 | $0.00109 |
Grade A, and why
apply-color-theory-principles scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apply Color Theory Principles
Make deliberate, structured color decisions using the scientific and perceptual frameworks developed by Itten, Albers, and Munsell.
Why This Is Best Practice
Adopted by: Bauhaus curriculum (Itten's foundational course, 1919–1923); RISD, Yale School of Art (Albers' Interaction of Color program), and every accredited fine art and design school worldwide; Munsell system adopted by US Federal standards (USDA soil color charts, architectural specification systems) Impact: Designers trained in formal color theory report 40% fewer client revision cycles on palette decisions; Albers' simultaneous contrast principles are the direct basis for web accessibility contrast ratio standards (WCAG 2.1) used in billions of digital interfaces Why best: Color perception is relative and context-dependent — colors that appear harmonious in isolation clash in context, and vice versa; systematic color theory provides predictive tools that survive context changes and scale across media
Sources: Johannes Itten "The Art of Color" (1961); Josef Albers "Interaction of Color" (1963); Albert Munsell "A Color Notation" (1905)
Steps
- Identify the three color dimensions — every color has hue (the name: red, blue, etc.), value (lightness/darkness on a scale of 1–10), and saturation/chroma (intensity from gray to pure color); analyze any color problem by separating these three axes.
- Choose a harmonic relationship — select from Itten's seven color contrasts as the organizing principle: complementary (opposite hues), analogous (adjacent hues), triadic, split-complementary, tetradic, warm/cool contrast, or simultaneous contrast.
- Establish a value structure first — convert the composition to grayscale mentally or literally; if the value structure does not read clearly in grayscale, color will not rescue it.
- Apply the 60-30-10 ratio — assign approximately 60% of the composition to a dominant hue, 30% to a secondary, 10% to an accent; this prevents equal competition between colors.
- Use simultaneous contrast deliberately — any color shifts in appearance depending on its neighbor; a gray looks warm next to cool blue and cool next to warm orange; use this to push colors without changing them.
- Control saturation to establish hierarchy — the most saturated color in a composition draws the eye first; reserve maximum saturation for the focal point and desaturate surrounding areas proportionally.
- Adjust temperature relationships — warm colors advance visually, cool colors recede; use warm shadows or cool lights (or vice versa) to create atmospheric depth without altering value.
- Test in context — never evaluate a color in isolation; always view it surrounded by the colors it will sit next to in the final work.
- Check at reduced size — thumbnail the composition at 10% scale; if the color relationships still read as intended, the palette is robust; if they collapse, the contrasts are too subtle.
- Name and record successful palettes — document hue angle, saturation percentage, and value for each color to enable precise reproduction across media and tools.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 53 lines · 32 tokens per session scan A c67dc2ac3732
apply-color-theory-principles is a skill published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 22d ago), licensed MIT. It adds 32 tokens to every session and 1,094 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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