Supermarket Yellow
Supermarket Yellow is a BigCommerce theme by Papathemes ($195). Tested on 2026-11-10 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 60 for mobile speed and 80 for desktop speed, 59/59 for SEO and 89/88 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 6.9 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile44

Desktop58

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 60 | 80 |
| SEO | 59 | 59 |
| Accessibility | 89 | 88 |
| Best practices | 91 | 91 |
Single preset · measured 30 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Supermarket-Yellow home page
Mobile
Speed 44 · 56 points to gain
- −25 Largest Contentful Paint medium effort
- −11.1 Total Blocking Time medium effort
- −10 First Contentful Paint medium effort
- −10 Speed Index medium effort
- 12.9 s Reduce unused JavaScript high effort
- 1.7 s Reduce unused CSS high effort
SEO 61 · 39 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links do not have descriptive text low effort
Accessibility 86 · 14 points to gain
- −4.1 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −2.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.9 Links do not have a discernible name medium effort
- −2.9 Touch targets do not have sufficient size or spacing. medium effort
- −1.2 Heading elements are not in a sequentially-descending order medium effort
Best practices 77 · 23 points to gain
- −19.2 Uses third-party cookies high effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 58 · 42 points to gain
- −26.7 Total Blocking Time medium effort
- −9.4 Speed Index medium effort
- −5.5 Largest Contentful Paint medium effort
- 120 ms Reduce unused JavaScript high effort
SEO 61 · 39 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links do not have descriptive text low effort
Accessibility 86 · 14 points to gain
- −4.1 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
- −2.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.9 Links do not have a discernible name medium effort
- −2.9 Touch targets do not have sufficient size or spacing. medium effort
- −1.2 Heading elements are not in a sequentially-descending order medium effort
Best practices 77 · 23 points to gain
- −19.2 Uses third-party cookies high effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Supermarket-Yellow default demo ↗ | 60 | 59 | 89 | 80 | 59 | 88 | 2026-11-07 |
| category ↗ | 76 | 61 | 91 | 94 | 61 | 89 | 2026-11-10 |
| home ↗ | 44 | 61 | 86 | 58 | 61 | 86 | 2026-11-07 |
| product ↗ | 59 | 54 | 89 | 88 | 54 | 89 | 2026-11-10 |