Principle
Principle is a Ghost theme by highfivethemes.lemonsqueezy ($149). Tested on 2026-11-07 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 65 for mobile speed and 94 for desktop speed, 85/85 for SEO and 95/95 for accessibility (mobile/desktop, 0–100).
Mobile65
Desktop94
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 65 | 94 |
| SEO | 85 | 85 |
| Accessibility | 95 | 95 |
| Best practices | 100 | 100 |
Single preset · measured 8 times since 2026-10-09 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Principle home page
Mobile
Speed 65 · 35 points to gain
- −25 Largest Contentful Paint medium effort
- −4.8 Speed Index medium effort
- −3.9 Total Blocking Time medium effort
- −1.1 First Contentful Paint medium effort
- 1.7 s Reduce unused JavaScript high effort
- 150 ms Reduce unused CSS high effort
SEO 85 · 15 points to gain
- −7.7 Links do not have descriptive text low effort
- −7.7 Links are not crawlable medium effort
Accessibility 95 · 5 points to gain
- −3.5 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −1.5 Heading elements are not in a sequentially-descending order medium effort
Desktop
Speed 94 · 6 points to gain
- −5.2 Largest Contentful Paint medium effort
- 260 ms Reduce unused JavaScript high effort
SEO 85 · 15 points to gain
- −7.7 Links do not have descriptive text low effort
- −7.7 Links are not crawlable medium effort
Accessibility 95 · 5 points to gain
- −3.7 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −1.6 Heading elements are not in a sequentially-descending order medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Principle default demo ↗ | 65 | 85 | 95 | 94 | 85 | 95 | 2026-11-07 |
| home ↗ | 65 | 85 | 95 | 94 | 85 | 95 | 2026-11-07 |
Show this score on your site
A live badge: it always shows Principle's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/ghost/principle"><img src="https://themestested.com/badge/ghost/principle.svg" alt="Principle speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.