Blum
Blum is a Shopify theme by eComX ($170). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 77 for mobile speed and 97 for desktop speed, 97/97 for SEO and 99/98 for accessibility (mobile/desktop, 0–100). Those are medians across its 5 tested presets; mobile speed across every tested page ranges from 50 to 89. On its marketplace it is rated 5.0 out of 5 from 259 reviews.
Mobile77
Desktop97
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 77 | 97 |
| SEO | 97 | 97 |
| Accessibility | 99 | 98 |
| Best practices | 93 | 95 |
Median of 5 presets · measured 30 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Totem home page
Mobile
Speed 77 · 23 points to gain
- −18 Largest Contentful Paint medium effort
- −2.8 Speed Index medium effort
- −2.5 First Contentful Paint medium effort
- 150 ms Reduce unused JavaScript high effort
Best practices 92 · 8 points to gain
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 97 · 3 points to gain
- −1.4 Speed Index medium effort
- −1.3 Largest Contentful Paint 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 | ||||||
| Totem default demo ↗ | 78 | 100 | 100 | 93 | 100 | 99 | 2026-09-11 |
| category ↗ | 78 | 100 | 100 | 96 | 100 | 100 | 2026-09-12 |
| home ↗ | 77 | 100 | 100 | 97 | 100 | 100 | 2026-09-11 |
| product ↗ | 79 | 100 | 100 | 86 | 100 | 96 | 2026-09-12 |
| Solie demo ↗ | 67 | 100 | 98 | 97 | 100 | 98 | 2026-09-11 |
| category ↗ | 69 | 100 | 100 | 97 | 100 | 100 | 2026-09-12 |
| home ↗ | 50 | 100 | 94 | 96 | 100 | 97 | 2026-09-11 |
| product ↗ | 81 | 100 | 100 | 98 | 100 | 96 | 2026-09-12 |
| Monti demo ↗ | 77 | 97 | 99 | 97 | 97 | 98 | 2026-09-11 |
| category ↗ | 76 | 100 | 100 | 97 | 100 | 100 | 2026-09-12 |
| home ↗ | 86 | 92 | 97 | 95 | 92 | 97 | 2026-09-11 |
| product ↗ | 69 | 100 | 100 | 98 | 100 | 96 | 2026-09-12 |
| Blum demo ↗ | 78 | 97 | 99 | 93 | 97 | 99 | 2026-09-11 |
| category ↗ | 76 | 100 | 100 | 97 | 100 | 100 | 2026-09-12 |
| home ↗ | 89 | 92 | 97 | 83 | 92 | 100 | 2026-09-11 |
| product ↗ | 69 | 100 | 100 | 98 | 100 | 96 | 2026-09-12 |
| Fuji demo ↗ | 73 | 97 | 99 | 97 | 97 | 98 | 2026-09-11 |
| category ↗ | 71 | 100 | 100 | 97 | 100 | 100 | 2026-09-12 |
| home ↗ | 78 | 92 | 97 | 97 | 92 | 97 | 2026-09-11 |
| product ↗ | 69 | 100 | 100 | 97 | 100 | 96 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Blum's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/blum"><img src="https://themestested.com/badge/shopify/blum.svg" alt="Blum speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.