Luna and Sun
Luna and Sun is a Squarespace theme by Squarespace (Free). Tested on 2026-10-28 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 29 for mobile speed and 40 for desktop speed, 92/92 for SEO and 94/96 for accessibility (mobile/desktop, 0–100).
Mobile29
Desktop40
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 29 | 40 |
| SEO | 92 | 92 |
| Accessibility | 94 | 96 |
| Best practices | 100 | 100 |
Single preset · measured 8 times since 2026-10-14 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Luna and Sun home page
Mobile
Speed 29 · 71 points to gain
- −25 Largest Contentful Paint medium effort
- −23.5 Cumulative Layout Shift medium effort
- −9.8 First Contentful Paint medium effort
- −8.3 Speed Index medium effort
- −4.2 Total Blocking Time medium effort
- 2.6 s Reduce unused JavaScript high effort
- 750 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 94 · 6 points to gain
- −6 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Desktop
Speed 40 · 60 points to gain
- −25 Cumulative Layout Shift medium effort
- −15.3 Largest Contentful Paint medium effort
- −12 Total Blocking Time medium effort
- −6.4 Speed Index medium effort
- −0.9 First Contentful Paint medium effort
- 360 ms Reduce unused JavaScript high effort
- 110 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 96 · 4 points to gain
- −4.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Luna and Sun default demo ↗ | 29 | 92 | 94 | 40 | 92 | 96 | 2026-10-28 |
| home ↗ | 29 | 92 | 94 | 40 | 92 | 96 | 2026-10-28 |
Show this score on your site
A live badge: it always shows Luna and Sun's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/squarespace/luna-and-sun-fluid-demo"><img src="https://themestested.com/badge/squarespace/luna-and-sun-fluid-demo.svg" alt="Luna and Sun speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.