Blum
Blum is a Shopify theme by eComX ($170). Tested on 2026-11-08 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 81 for mobile speed and 98 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 71 to 94. On its marketplace it is rated 5.0 out of 5 from 259 reviews. Note: its demo home page is heavy — 14.9 MB — heavier than a typical store, so the speed score may understate the theme.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 81 | 98 |
| SEO | 97 | 97 |
| Accessibility | 99 | 98 |
| Best practices | 96 | 96 |
Median of 5 presets · measured 270 times since 2026-11-06 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Totem home page
Mobile
Speed 71 · 29 points to gain
- −20.8 Largest Contentful Paint medium effort
- −4.9 Speed Index medium effort
- −3.7 First Contentful Paint medium effort
- 150 ms Reduce unused JavaScript high effort
Best practices 77 · 23 points to gain
- −19.2 Uses deprecated APIs medium effort
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 97 · 3 points to gain
- −2.7 Largest Contentful Paint medium effort
- −0.7 Speed Index 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 ↗ | 72 | 100 | 100 | 98 | 100 | 99 | 2026-11-06 |
| category ↗ | 73 | 100 | 100 | 98 | 100 | 100 | 2026-11-08 |
| home ↗ | 71 | 100 | 100 | 97 | 100 | 100 | 2026-11-06 |
| product ↗ | 71 | 100 | 100 | 99 | 100 | 96 | 2026-11-08 |
| Monti demo ↗ | 76 | 95 | 91 | 93 | 95 | 91 | 2026-11-06 |
| category ↗ | 78 | 100 | 93 | 94 | 100 | 93 | 2026-11-07 |
| home ↗ | 77 | 85 | 84 | 93 | 85 | 84 | 2026-11-06 |
| product ↗ | 74 | 100 | 95 | 93 | 100 | 95 | 2026-11-07 |
| Solie demo ↗ | 81 | 100 | 98 | 98 | 100 | 98 | 2026-11-07 |
| category ↗ | 80 | 100 | 100 | 98 | 100 | 100 | 2026-11-08 |
| home ↗ | 73 | 100 | 94 | 98 | 100 | 97 | 2026-11-07 |
| product ↗ | 91 | 100 | 100 | 99 | 100 | 96 | 2026-11-08 |
| Blum demo ↗ | 90 | 97 | 99 | 99 | 97 | 99 | 2026-11-06 |
| category ↗ | 85 | 100 | 100 | 98 | 100 | 100 | 2026-11-08 |
| home ↗ | 94 | 92 | 97 | 99 | 92 | 100 | 2026-11-06 |
| product ↗ | 91 | 100 | 100 | 99 | 100 | 96 | 2026-11-08 |
| Fuji demo ↗ | 82 | 97 | 99 | 99 | 97 | 98 | 2026-11-06 |
| category ↗ | 74 | 100 | 100 | 99 | 100 | 100 | 2026-11-08 |
| home ↗ | 81 | 92 | 97 | 99 | 92 | 97 | 2026-11-06 |
| product ↗ | 92 | 100 | 100 | 99 | 100 | 96 | 2026-11-08 |
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.