Terra Dark
Terra Dark is a BigCommerce theme by epicShops ($300). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 55 for mobile speed and 84 for desktop speed, 85/85 for SEO and 91/91 for accessibility (mobile/desktop, 0–100).
Mobile55
Desktop84
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 55 | 84 |
| SEO | 85 | 85 |
| Accessibility | 91 | 91 |
| Best practices | 92 | 96 |
Single preset · measured 2 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Terra-Dark home page
Mobile
Speed 55 · 45 points to gain
- −24.8 Cumulative Layout Shift medium effort
- −14.3 Largest Contentful Paint medium effort
- −4.7 First Contentful Paint medium effort
- −1.6 Speed Index medium effort
- 500 ms Reduce unused CSS high effort
- 200 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 91 · 9 points to gain
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Best practices 92 · 8 points to gain
- −3.8 Serves images with low resolution low effort
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 84 · 16 points to gain
- −13 Cumulative Layout Shift medium effort
- −1.7 Largest Contentful Paint medium effort
- −0.9 Speed Index medium 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 91 · 9 points to gain
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. 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 | ||||||
| Terra-Dark default demo ↗ | 55 | 85 | 91 | 84 | 85 | 91 | 2026-09-12 |
| home ↗ | 55 | 85 | 91 | 84 | 85 | 91 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Terra Dark's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/bigcommerce/terra-dark"><img src="https://themestested.com/badge/bigcommerce/terra-dark.svg" alt="Terra Dark speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.