Bolt — Design Score: 84/100 (grade B)
Strong typography & motion polish (92, 90) undercut by weak button contrast (3.12:1) and sparse responsive design (1 breakpoint)—B grade hiding a mobile liability.
This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/score/bolt.new.
The four measured dimensions
- Typography & Hierarchy: 92/100
- Color & Contrast: 81/100
- Spacing & Layout: 70/100
- Motion & Polish: 90/100
What we measured
- Typography & Hierarchy — type ladder rhythm: 2.00× · 1.33× · 2.25× · 1.14× (26.7/35)
- Typography & Hierarchy — weight contrast: [400, 500, 600, 700] (spread 300) (20.0/20)
- Typography & Hierarchy — body line-height: 1.50 (15.0/15)
- Typography & Hierarchy — heading line-height: 1.00 (10.0/10)
- Typography & Hierarchy — size discipline: 5 (20.0/20)
- Color & Contrast — body text contrast (WCAG): 17.90:1 (30.0/30)
- Color & Contrast — primary button contrast: 3.12:1 (5.2/10)
- Color & Contrast — accent discipline: 2 (20.0/20)
- Color & Contrast — surface coverage: 78% dominant (16.0/20)
- Color & Contrast — scheme consistency: dark (10.0/20)
- Spacing & Layout — spacing grid: 4px grid · 82% confidence (28.7/35)
- Spacing & Layout — grid adherence: 8/12 on 4px (16.7/25)
- Spacing & Layout — structure & responsive: 1 breakpoints (12.0/15)
- Motion & Polish — motion tokens: 150ms dominant (25.0/25)
- Motion & Polish — choreography: 0 reveal candidates (10.0/20)
Every line above is read from the live DOM — the exact contrast ratio, the detected spacing grid, the forced hover states — not an AI's guess from a screenshot.
Top fixes
- Raise primary button contrast to ≥4.5:1
- Add responsive breakpoints for tablet & mobile
- Tighten spacing grid adherence to ≥90%
The comprehensive report — every fix with why + the exact how-to — is part of Mozaika Pro.
An automated measurement of Bolt's publicly-visible design (color, type, spacing, motion) — not affiliated with bolt.new. Removal requests: hello@mozaika.design.