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 memi-design/design-skills --skill better-colorsgit clone --depth 1 https://github.com/memi-design/design-skillsWrote 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/memi-design/design-skills/better-colors)<a href="https://agentmods.dev/skills/memi-design/design-skills/better-colors"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/better-colors/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/memi-design/design-skills/better-colors"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/better-colors.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 | $0.00077 | $0.01390 |
| Opus 5 | $0.00039 | $0.00695 |
| Sonnet 5 | $0.00015 | $0.00278 |
| Haiku 4.5 | $0.00008 | $0.00139 |
Grade A, and why
better-colors 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.
This is a copy
89% identical to oklch-skill — 27 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OKLCH Colors
OKLCH is a perceptually uniform color space where the numbers actually mean what you think they mean. Most color problems in CSS (broken palettes, failing contrast, hue drift) come from using color spaces that don't match how we see. OKLCH fixes the model so the tools work. To explore interactively, visit oklch.fyi.
Quick Reference
| Category | When to use | Reference |
|---|---|---|
| Conversion | Hex/rgb/hsl to oklch | color-conversion.md |
| Palettes | Generate scales, multi-hue, dark mode | palette-generation.md |
| Contrast | APCA/WCAG checks, fixing failing contrast | accessibility-contrast.md |
| Gamut & Tailwind | P3 fallbacks, @theme scales, gamut clamping |
gamut-and-tailwind.md |
Why OKLCH
- Perceptual uniformity. Equal L steps = equal brightness.
oklch(0.5 ...)is visually mid. HSL'slightness: 50%varies wildly by hue. - Stable hue. HSL blue shifts toward purple as lightness changes. OKLCH hue stays constant across the full lightness range.
- Independent chroma. Chroma is an absolute measure of colorfulness that doesn't depend on lightness. HSL saturation does.
- Finite gamut. Not every oklch value maps to a displayable sRGB color. High-chroma values at certain hues will clip; gamut awareness is required.
OKLCH Syntax
oklch(L C H)
oklch(L C H / alpha)
| Channel | Range | Description |
|---|---|---|
| L (Lightness) | 0–1 | 0 = black, 1 = white. Perceptually uniform. |
| C (Chroma) | 0–~0.4 | Colorfulness. 0 = gray. Max depends on L and H. |
| H (Hue) | 0–360 | Hue angle in degrees. |
| alpha | 0–1 | Optional transparency. Slash syntax. |
oklch(0.637 0.237 25.331)
oklch(0.8 0.05 200 / 0.5)
Formatting: L and C use 3 decimal places, H uses up to 3. Drop trailing zeros. Format -0 as 0. Browser support: Baseline 2023, 96%+ global coverage.
Key Thresholds
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 94 lines · 77 tokens per session scan A 182bdb139c92
better-colors is a skill published in the GitHub repository memi-design/design-skills (7 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 1,390 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to oklch-skill, differing in 27 lines, and is treated as a copy.
Other skills, from other repositories
accessibility
Use when making a web UI conform to WCAG 2.2 Level AA — axe-core or Lighthouse a11y violations, keyboard operability, focus management, ARIA roles/names/live regions, contrast, tap-target size. NOT palette or visual intent (that is design), NOT test-runner setup (that is testing-web), NOT LCP/page-speed (that is…
motion-craft
Use when an interface moves and the movement has to feel right — durations and easing, what must never animate, fixing motion that reads sluggish, cheap or janky, and reduced-motion. Web and native. NOT the visual system (that is design), NOT the graded critique (that is design-loop).
design-engineering
Premium design engineering skill for agentic workflows — produces high-end, distinctive UI designs using DESIGN.md as the portable contract across Pencil MCP (in-IDE canvas), Figma MCP (team handoff + design tokens), and Google Stitch (vibe exploration + AI generation). Enforces anti-generic principles, WCAG 2.2 AA…
motion-guide
Use when designing, adding, changing, suggesting, or reviewing UI motion. Motion Guide is a default-trigger motion decision advisor for AI coding agents: it decides whether motion should exist, selects an appropriate functional or expressive pattern, and constrains implementation with timing, easing, accessibility…
motion
Author verified, reduced-motion-safe web animation with MotionSpec. Use when adding scroll, entrance, hover, or loop animation to a website or web app — instead of hand-writing GSAP or CSS keyframes, write a MotionSpec JSON spec, validate it, and compile deterministic code.
canon-interaction
Use when designing or auditing interactive states (hover, focus, active, disabled, loading), focus management, keyboard navigation, click targets, drag-and-drop, or any user input handling. Trigger when the user mentions states, focus, hover, keyboard, interaction, click, tap, or fixing how something responds.