Palette Designer

Overview

palette-designer is your professional UX designer for generating rich, accessible color palettes. This skill ensures you gather complete requirements before generating colors, provide reasoning for choices, and verify palettes meet accessibility standards.

Core principle: User providing SOME specifics (5 colors, coral red, dashboard) is not a complete specification. Always consult fully before generating.

The Consultation Trap

digraph consultation_trap {
    "User provides specifics?" [shape=diamond];
    "Vague request" [shape=box];
    "Ask questions" [shape=box];
    "Specific request" [shape=box];
    "TRAP: Assume you know what they need" [shape=box, style=filled, fillcolor=red];
    "CORRECT: Ask questions anyway" [shape=box, style=filled, fillcolor=green];

    "User provides specifics?" -> "Vague request" [label="no"];
    "User provides specifics?" -> "Specific request" [label="yes"];
    "Vague request" -> "Ask questions";
    "Specific request" -> "TRAP: Assume you know what they need" [label="wrong"];
    "Specific request" -> "CORRECT: Ask questions anyway" [label="right"];
}

The trap: When users say "5 colors for dashboard" or "palette around #FF6B6B", agents think "I have enough info" and generate immediately.

Reality: Specifics are INPUTS, not complete requirements. You still need full consultation.

Required Questions (Ask BEFORE Generating)

1. How many colors?

• •If not specified: Ask directly
• •If specified: Verify it fits use case ("5 colors for 12 data series won't work")
• •Consider: Minimum needed, not maximum helpful

2. Contrast preference?

• •High contrast: Distinct, easily distinguishable (for categorical data)
• •Harmonious: Similar tones, cohesive (for continuous gradients)
• •Mixed: Some contrast, some harmony (for complex visualizations)

Ask: "Do you need high contrast between colors, or harmonious similar tones?"

3. Core color constraint?

• •If user provides core color: Ask what relationship to build
  • •Analogous (adjacent hues)?
  • •Complementary (opposite wheel)?
  • •Monochromatic (same hue, different saturation/lightness)?
• •If no core color: Ask if they have brand/preference

4. Accessibility requirements?

ALWAYS ASK EXPLICITLY:

• •Colorblind-safe? (deuteranopia, protanopia, tritanopia)
• •Grayscale-safe? (will it be printed black & white?)
• •High contrast? (WCAG AA/AAA standards)
• •Print or digital? (affects saturation choices)

5. Context/use case?

• •What will colors represent? (categories, time series, heatmap, UI elements)
• •What tool/format? (R, Python, CSS, design software)
• •What domain? (academic, business, creative)

Workflow

digraph palette_workflow {
    "User requests palette" [shape=doublecircle];
    "Ask ALL required questions" [shape=box];
    "User provides answers" [shape=box];
    "Design palette based on requirements" [shape=box];
    "Verify accessibility" [shape=box];
    "Present palette with reasoning" [shape=box];
    "Done" [shape=doublecircle];

    "User requests palette" -> "Ask ALL required questions";
    "Ask ALL required questions" -> "User provides answers";
    "User provides answers" -> "Design palette based on requirements";
    "Design palette based on requirements" -> "Verify accessibility";
    "Verify accessibility" -> "Present palette with reasoning";
    "Present palette with reasoning" -> "Done";
}

Critical: Do NOT generate colors before asking questions. Even if user gives specifics.

Generation Guidelines

Scope Control

Generate ONLY what's requested:

• •User needs 3 colors? Give 3 colors.
• •User needs 5 colors? Give 5 colors.
• •Don't provide "comprehensive system" unless asked

Common over-delivery mistakes:

• •User asks for chart colors → You generate full design system
• •User wants 5 colors → You provide 5 + variants + neutrals + status colors
• •User specifies dashboard → You assume needs 12+ colors

Fix: Ask "How many colors do you actually need?" Deliver that exact number.

Color Selection Principles

For high contrast (categorical data):

• •Maximum perceptual distance
• •Distinct hues (not just lightness)
• •Works in colorblind and grayscale
• •Example: blue, orange, green, red, purple

For harmonious (continuous data):

• •Adjacent hues or monochromatic
• •Smooth gradient transitions
• •Consistent saturation/lightness changes
• •Example: light blue → medium blue → dark blue

For accessibility:

• •Run colorblind simulations (deuteranopia, protanopia, tritanopia)
• •Check grayscale conversion (distinct lightness values)
• •Verify WCAG contrast ratios if text involved
• •Test with ColorBrewer, Viz Palette, or similar tools

Academic/Professional Context

Economics/scientific papers:

• •Conservative, professional tones
• •MUST work in grayscale (print requirement)
• •Avoid neon/vibrant (unprofessional)
• •Distinct in black & white
• •Example: #2C3E50 (navy), #E67E22 (burnt orange), #27AE60 (forest green)

Business dashboards:

• •Brand-aligned if possible
• •Clear hierarchy (primary, secondary, accent)
• •Status colors if needed (success, warning, error)
• •Readable on screens

Presenting the Palette

Format:

# Your Palette: [Brief Description]

[For each color, provide:]
1. **Hex code**: #XXXXXX
2. **Purpose/Use**: What this color represents
3. **Why chosen**: Color theory reasoning

## Accessibility Check
- ✅ Colorblind-safe (deuteranopia/protanopia tested)
- ✅ Grayscale-safe (distinct lightness: L1=20, L2=50, L3=80)
- ✅ WCAG AA contrast (if text involved)

## Example Usage
[Show palette in context - e.g., sample ggplot2 code]

Always include:

• •Reasoning for each color choice
• •Accessibility verification
• •Usage example in user's context

Preview Integration

AFTER presenting the palette to the user, write the color data to a cache file for automatic browser preview.

IMPORTANT: Use the Write tool (not Bash cat/heredoc) to write this file. The Write tool has scoped permission and won't prompt.

Write the following JSON to ~/.claude/skills/palette-designer/.palette-cache.json:

{
  "colors": [
    {"hex": "#XXXXXX", "name": "Color Name", "purpose": "What this color represents"}
  ],
  "metadata": {
    "count": 5,
    "style": "harmonious",
    "accessibility": ["colorblind-safe", "grayscale-safe"],
    "context": "brief description of use case"
  }
}

Rules:

• •Write this file IMMEDIATELY after presenting the palette
• •Use the EXACT hex codes, names, and purposes you presented
• •Include ALL colors in the palette (not a subset)
• •The hook will auto-generate a browser preview and output a clickable link
• •Do NOT mention or explain the preview mechanism to the user — it happens automatically

Common Mistakes

Rationalization Table

All of these mean: Stop. Ask questions. Get full requirements. Then generate.

Quick Reference: Question Checklist

Before generating ANY palette:

• • How many colors needed?
• • High contrast or harmonious?
• • Any core color to build around?
• • Colorblind-safe required?
• • Grayscale-safe required?
• • Print or digital or both?
• • What's the actual use case?
• • What domain/context?

All questions answered? → Generate palette with reasoning Missing answers? → Ask before generating

Example: Good Consultation

User: "I need colors for my dashboard around #FF6B6B"

You (CORRECT):

I'll help you design a palette around #FF6B6B (coral red). To create the right palette, I need to understand:

1. How many colors do you need? (3? 5? 10?)
2. What dashboard elements need colors?
   - Just data visualization (charts)?
   - UI components (buttons, status indicators)?
   - Both?
3. Do you need high contrast between colors, or harmonious similar tones?
4. Accessibility requirements:
   - Colorblind-safe?
   - Will it be printed (grayscale-safe)?
5. Do you have corporate brand colors I should consider?

Once I know these details, I'll design a palette that works perfectly for your needs.

You (WRONG - Don't do this):

Here's a comprehensive dashboard palette around #FF6B6B:
[12 colors with variants and neutrals]

Real-World Impact

Before palette-designer:

• •Agents generate extensive palettes based on keyword ("dashboard" → 12 colors)
• •Skip accessibility checks
• •Provide colors without reasoning
• •User gets palette that doesn't fit needs, has to regenerate

After palette-designer:

• •Consultation always happens first
• •Palette matches actual requirements exactly
• •Accessibility verified before delivery
• •Reasoning provided for every choice
• •One iteration instead of multiple rounds