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design-color-systems

Produces accessible color palettes and CSS design-token implementations for brands and websites. Use when the task asks for "color palette", "brand colors", "color scheme", "WCAG contrast", "dark mode colors", "design tokens", or "CSS custom properties for colors". Covers color theory, WCAG 2.2 contrast compliance, dark mode, AI palette extraction, and color psychology.

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Color Systems

Use this skill when designing or reviewing color palettes, implementing them in code, or ensuring accessibility compliance.

MCP Tool Discovery

The plugin provides visual analysis tools usable across agent contexts:

Color TaskTool Name Pattern
Extract palettes from imagesanalyze_image — query for dominant colors
Generate palette swatchesnv_oos_*_agent_generate_gemini_image_validated or bare
Web search for color trendsnv_oos_*_agent_web_search_validated or bare
Cross-site color syncremote_wp_connection — push brand colors to spoke sites

WP-CLI Commands

Key mcp-ai WP-CLI commands for design workflows. Run via terminal:

CommandUse for
wp mcp-ai healthVerify tool and provider availability
wp mcp-ai providerCheck configured AI providers

When to use this skill

Trigger when ANY of the following is true:

  • Creating a new color palette for a brand, website, or design project.
  • Implementing color tokens / design tokens in CSS.
  • Auditing color contrast for WCAG compliance.
  • Adding dark mode or multiple theme support.
  • Extracting colors from images or generating complementary palettes.
  • The task mentions "color scheme", "palette", "brand colors", or "accessibility contrast".

Color theory foundations

Color relationships

Primary        → Main brand color (60% usage)
Secondary      → Complementary accent (30% usage)
Accent         → CTAs, highlights (10% usage)
Neutral        → Text, backgrounds, borders
Semantic       → Success (green), Error (red), Warning (amber), Info (blue)

Palette types

TypeStructureExample
MonochromaticOne hue, varying saturation/lightnessSpotify green ecosystem
Analogous2-3 adjacent hues on color wheelCalm, cohesive brands (wellness, nature)
ComplementaryOpposite hues (blue + orange)High contrast, energetic (sports, entertainment)
Triadic3 evenly spaced huesVibrant, balanced (education, family)
Neutral + PopGrays + one bold accentModern, sophisticated (tech, luxury)

WCAG contrast requirements

LevelNormal TextLarge Text (18px+ bold or 24px+)UI Components
AA (minimum)4.5:13:13:1
AAA (enhanced)7:14.5:13:1

Test contrast: https://webaim.org/resources/contrastchecker/

Common failing combinations

❌ #CCCCCC text on #FFFFFF — 1.6:1 (fail AA)
✅ #767676 text on #FFFFFF — 4.5:1 (pass AA)

❌ #999999 text on #FFFFFF — 2.85:1 (fail AA large text threshold)
✅ #595959 text on #FFFFFF — 7:1 (pass AAA)

CSS custom properties implementation

Design tokens

:root {
  /* ── Brand palette ── */
  --color-primary:        #2563EB;
  --color-primary-light:  #3B82F6;
  --color-primary-dark:   #1D4ED8;

  --color-secondary:      #7C3AED;
  --color-accent:         #F59E0B;

  /* ── Neutrals ── */
  --color-neutral-50:     #FAFAFA;
  --color-neutral-100:    #F5F5F5;
  --color-neutral-200:    #E5E5E5;
  --color-neutral-300:    #D4D4D4;
  --color-neutral-400:    #A3A3A3;
  --color-neutral-500:    #737373;
  --color-neutral-600:    #525252;
  --color-neutral-700:    #404040;
  --color-neutral-800:    #262626;
  --color-neutral-900:    #171717;

  /* ── Semantic ── */
  --color-success:        #16A34A;
  --color-warning:        #D97706;
  --color-error:          #DC2626;
  --color-info:           #2563EB;

  /* ── Applied tokens ── */
  --color-text:           var(--color-neutral-900);
  --color-text-muted:     var(--color-neutral-500);
  --color-bg:             #FFFFFF;
  --color-bg-muted:       var(--color-neutral-50);
  --color-border:         var(--color-neutral-200);
}

Dark mode

@media (prefers-color-scheme: dark) {
  :root {
    --color-text:         var(--color-neutral-100);
    --color-text-muted:   var(--color-neutral-400);
    --color-bg:           var(--color-neutral-900);
    --color-bg-muted:     var(--color-neutral-800);
    --color-border:       var(--color-neutral-700);
  }
}

/* Manual toggle */
[data-theme="dark"] {
  --color-text:         var(--color-neutral-100);
  --color-bg:           var(--color-neutral-900);
  /* ... */
}

AI-assisted palette work (MCP)

Extract palette from an image

Use analyze_image (MCP) to identify dominant colors, color mood, and palette composition from any image:

analyze_image with prompt: "Extract the dominant color palette from this
image. List hex values for primary, secondary, accent, and neutral colors."

Generate mood boards

Use the Gemini image tool in your tool list (agent-prefixed or bare) to create color palette swatches and mood boards:

prompt: "A warm, earthy brand palette for an organic coffee company —
         rich browns, cream, sage green accent, modern and minimal.
         Display as organized color swatches with hex labels."

Color psychology quick reference

ColorAssociationsBest For
BlueTrust, stability, professionalismFinance, tech, healthcare
GreenGrowth, nature, healthWellness, environment, education
RedEnergy, urgency, passionFood, entertainment, sales
PurpleLuxury, creativity, wisdomBeauty, spirituality, premium
OrangeFriendly, confident, warmE-commerce CTAs, youth brands
YellowOptimism, clarity, warmthChildren, creativity, warnings
BlackSophistication, power, eleganceLuxury, fashion, tech
WhiteClean, minimal, pureHealthcare, minimalism, modern

Critical rules

  • 60-30-10 rule — 60% dominant (backgrounds), 30% secondary (UI elements), 10% accent (CTAs).
  • Test contrast for ALL text — especially muted/secondary text, which often fails.
  • Don't rely on color alone — use icons, underlines, or patterns for colorblind users.
  • Define neutral scale first — a good gray scale (8–10 steps) is more important than brand colors.
  • Use HSL for programmatic manipulation — hsl(var(--hue), 80%, 50%) makes theming trivial.
  • Extract palettes with AI — use analyze_image (MCP) to pull color schemes from reference images.

Common mistakes

/* WRONG — hardcoded colors everywhere */
.button { background: #2563EB; color: white; }
.card { border: 1px solid #E5E5E5; background: white; }

/* RIGHT — design tokens */
.button { background: var(--color-primary); color: var(--color-bg); }
.card { border: 1px solid var(--color-border); background: var(--color-bg); }

/* WRONG — low contrast muted text */
.caption { color: #CCCCCC; } /* 1.6:1 on white — fails AA */

/* RIGHT — accessible muted text */
.caption { color: var(--color-text-muted); } /* from token system */

What This Skill Does NOT Cover

  • Logo design and brand mark creation — use design-brand-kit.
  • Font selection and typography pairing — use design-typography.
  • Full brand guideline document generation — use design-document-generation.
  • Image generation or editing — use design-image-generation.
  • WordPress theme development or block styling — use wp-plugin-architecture.
  • Social media content creation — use design-social-content.
  • UI component library building (React/Vue components) — this skill is CSS-focused; component frameworks are out of scope.

Cross-references

  • Run design-brand-kit to define the full brand identity including colors.
  • Run design-typography to pair fonts with the color palette.
  • Run design-image-generation to create visuals using the brand palette — check your tool list for the Gemini image tool.
  • Run wp-plugin-options-storage to store color tokens in WordPress settings.
  • Run mcp-ai-wpoos-plugin for remote_wp_connection — push color palettes from Hub to spoke sites.

References

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