lmiranda
5152cda161
Extract shared knowledge from 10 commands into 7 reusable skills: - mcp-tools-reference.md: All viz-platform MCP tool signatures - theming-system.md: Theme tokens, CSS variables, color palettes - accessibility-rules.md: WCAG contrast, color-blind safe palettes - dmc-components.md: DMC categories, validation, common props - responsive-design.md: Breakpoints, mobile-first, grid config - chart-types.md: Plotly chart types, export formats, resolution - layout-templates.md: Dashboard templates, filter types All commands now reference skills via "Skills to Load" section. Commands reduced from 1396 lines total to 427 lines (69% reduction). Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Accessibility Rules
WCAG Contrast Standards
| Level | Ratio | Use Case |
|---|---|---|
| AA (normal text) | 4.5:1 | Body text, labels |
| AA (large text) | 3:1 | Headings, 14pt+ bold |
| AAA (enhanced) | 7:1 | Highest accessibility |
Color Blindness Types
| Type | Affected Colors | Population |
|---|---|---|
| Deuteranopia | Red-Green (green-blind) | ~6% males, 0.4% females |
| Protanopia | Red-Green (red-blind) | ~2.5% males, 0.05% females |
| Tritanopia | Blue-Yellow | ~0.01% total |
Color-Blind Safe Palettes
IBM Design Colors
#648FFF #785EF0 #DC267F #FE6100 #FFB000
Tableau Colorblind 10
#006BA4 #FF800E #ABABAB #595959 #5F9ED1
#C85200 #898989 #A2C8EC #FFBC79 #CFCFCF
Okabe-Ito
#E69F00 #56B4E9 #009E73 #F0E442 #0072B2
#D55E00 #CC79A7 #000000
Safe Palette Categories
{
"categorical": ["#4477AA", "#EE6677", "#228833", "#CCBB44", "#66CCEE", "#AA3377", "#BBBBBB"],
"sequential": ["#FEE0D2", "#FC9272", "#DE2D26"],
"diverging": ["#4575B4", "#FFFFBF", "#D73027"]
}
Best Practices
- Don't rely on color alone - Use shapes, patterns, or labels
- Test with simulation - View through color blindness simulators
- Use sufficient contrast - Minimum 4.5:1 for text, 3:1 for large elements
- Limit color count - Fewer colors = easier to distinguish
- Use semantic colors - Blue for information, red for errors (with icons)
Accessibility Scoring
| Grade | Description |
|---|---|
| A | Excellent - All WCAG AAA standards met |
| B | Good - WCAG AA standards met with minor warnings |
| C | Acceptable - WCAG AA met but improvements recommended |
| D | Poor - Some WCAG AA failures |
| F | Failing - Major accessibility issues |