Colorblock
Colorblock is a Shopify theme by Shopify (Free). Tested on 2026-10-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 86 for mobile speed and 94 for desktop speed, 95/95 for SEO and 97/98 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 3.0 out of 5 from 7 reviews.
Mobile76
Desktop85
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 86 | 94 |
| SEO | 95 | 95 |
| Accessibility | 97 | 98 |
| Best practices | 95 | 96 |
Single preset · measured 12 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — colorblock home page
Mobile
Speed 76 · 24 points to gain
- −17 Largest Contentful Paint medium effort
- −5.5 Cumulative Layout Shift medium effort
- −1.3 First Contentful Paint medium effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 95 · 5 points to gain
- −3.4 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
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 85 · 15 points to gain
- −13.8 Cumulative Layout Shift medium effort
- −1.3 Largest Contentful Paint medium effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 95 · 5 points to gain
- −3.4 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
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| colorblock default demo ↗ | 86 | 95 | 97 | 94 | 95 | 98 | 2026-10-12 |
| category ↗ | 95 | 92 | 97 | 98 | 92 | 100 | 2026-10-12 |
| home ↗ | 76 | 92 | 95 | 85 | 92 | 95 | 2026-10-12 |
| product ↗ | 87 | 100 | 100 | 100 | 100 | 100 | 2026-10-12 |
Show this score on your site
A live badge: it always shows Colorblock's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/colorblock"><img src="https://themestested.com/badge/shopify/colorblock.svg" alt="Colorblock speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.