Figma Design Validation with MCP

Guide for validating UI implementation against Figma designs using Figma MCP.

Prerequisites

Required:

• Figma MCP server configured
• Access to Figma design files
• Figma URLs for components/pages

Setup:

# Install Figma MCP (follow official docs)
# Configure API token
# Verify access to design files

Validation Workflow

Step 1: Get Design Specifications

Using Figma MCP:

"Get the specifications for the primary button from Figma file at [URL]"

Response includes:
- Dimensions (width, height)
- Colors (background, text, border)
- Typography (font, size, weight)
- Spacing (padding, margin)
- Border radius
- States (default, hover, active, disabled)

Step 2: Inspect Implementation

Browser DevTools:

1. Inspect element
2. Check computed styles
3. Verify dimensions
4. Compare colors (use color picker)
5. Check typography
6. Test interactive states

Step 3: Document Discrepancies

Create test case or bug:

TC-UI-001: Primary Button Visual Validation

Design (Figma):
- Size: 120x40px
- Background: #0066FF
- Border-radius: 8px
- Font: 16px Medium #FFFFFF

Implementation:
- Size: 120x40px ✓
- Background: #0052CC ✗ (wrong shade)
- Border-radius: 8px ✓
- Font: 16px Regular #FFFFFF ✗ (wrong weight)

Status: FAIL
Bugs: BUG-234, BUG-235

What to Validate

Layout & Spacing

• Component dimensions
• Padding (all sides)
• Margins
• Grid alignment
• Responsive breakpoints
• Container max-width

Example Query:

"Extract spacing values for the card component from Figma"

Typography

• Font family
• Font size
• Font weight
• Line height
• Letter spacing
• Text color
• Text alignment

Example Query:

"Get typography specifications for all heading levels from Figma design system"

Colors

• Background colors
• Text colors
• Border colors
• Shadow colors
• Gradient values
• Opacity values

Example Query:

"List all color tokens used in the navigation component"

Components

• Icon sizes and colors
• Button states
• Input field styling
• Checkbox/radio appearance
• Dropdown styling
• Card components

Example Query:

"Compare the implemented dropdown menu with Figma design at [URL]"

Interactive States

• Default state
• Hover state
• Active/pressed state
• Focus state
• Disabled state
• Loading state
• Error state

Common Discrepancies

Typography Mismatches

• Wrong font weight (e.g., Regular instead of Medium)
• Incorrect font size
• Missing line-height
• Color hex codes off by a shade

Spacing Issues

• Padding not matching
• Inconsistent margins
• Grid misalignment
• Component spacing varies

Color Differences

• Hex values off (#0066FF vs #0052CC)
• Opacity not applied
• Gradient angles wrong
• Shadow colors incorrect

Responsive Behavior

• Breakpoints don't match
• Mobile layout different
• Tablet view inconsistent
• Scaling not as designed

Test Case Template

## TC-UI-XXX: [Component] Visual Validation

**Figma Design:** [URL to specific component]

### Desktop (1920x1080)

**Layout:**
- [ ] Width: XXXpx
- [ ] Height: XXXpx
- [ ] Padding: XXpx XXpx XXpx XXpx
- [ ] Margin: XXpx

**Typography:**
- [ ] Font: [Family] [Weight]
- [ ] Size: XXpx
- [ ] Line-height: XXpx
- [ ] Color: #XXXXXX

**Colors:**
- [ ] Background: #XXXXXX
- [ ] Border: Xpx solid #XXXXXX
- [ ] Shadow: XXpx XXpx XXpx rgba(X,X,X,X)

**Interactive States:**
- [ ] Hover: [changes]
- [ ] Active: [changes]
- [ ] Focus: [changes]
- [ ] Disabled: [changes]

### Tablet (768px)
- [ ] [Responsive changes]

### Mobile (375px)
- [ ] [Responsive changes]

### Status
- [ ] PASS - All match
- [ ] FAIL - Discrepancies found
- [ ] BLOCKED - Design incomplete

Figma MCP Queries

Component Specifications

"Get complete specifications for the [component name] from Figma at [URL]"
"Extract all button variants from the design system"
"List typography styles defined in Figma"

Color System

"Show me all color tokens in the Figma design system"
"What colors are used in the navigation bar design?"
"Get the exact hex values for primary, secondary, and accent colors"

Spacing & Layout

"What are the padding values for the card component?"
"Extract grid specifications from the page layout"
"Get spacing tokens (8px, 16px, 24px, etc.)"

Responsive Breakpoints

"What are the defined breakpoints in this Figma design?"
"Show mobile vs desktop layout differences for [component]"

Bug Report for UI Discrepancies

# BUG-XXX: [Component] doesn't match Figma design

**Severity:** Medium (UI)
**Type:** Visual

## Design vs Implementation

**Figma Design:** [URL]

**Expected (from Figma):**
- Button background: #0066FF
- Font weight: 600 (Semi-bold)
- Padding: 12px 24px

**Actual (in implementation):**
- Button background: #0052CC ❌
- Font weight: 400 (Regular) ❌
- Padding: 12px 24px ✓

## Screenshots

- Figma design: [attach]
- Current implementation: [attach]
- Side-by-side comparison: [attach]

## Impact

Users see inconsistent branding. Button appears less prominent than designed.

Automation Ideas

Visual Regression Testing

• Capture screenshots
• Compare against Figma exports
• Highlight pixel differences
• Tools: Percy, Chromatic, BackstopJS

Design Token Validation

• Extract Figma design tokens
• Compare with CSS variables
• Flag mismatches
• Automate with scripts

Best Practices

DO:

• ✅ Always reference specific Figma URLs
• ✅ Test all component states
• ✅ Check responsive breakpoints
• ✅ Document exact values (not "close enough")
• ✅ Screenshot both design and implementation
• ✅ Test in multiple browsers

DON'T:

• ❌ Assume "it looks right"
• ❌ Skip hover/active states
• ❌ Ignore small color differences
• ❌ Test only on one screen size
• ❌ Forget to check typography
• ❌ Miss spacing issues

Checklist for UI Test Cases

Per component:

• Figma URL documented
• Desktop layout validated
• Mobile/tablet responsive checked
• All interactive states tested
• Colors match exactly (use color picker)
• Typography specifications correct
• Spacing (padding/margins) accurate
• Icons match design
• Shadows/borders match
• Animations match timing/easing

Quick Reference

Remember: Pixel-perfect implementation builds user trust and brand consistency.