themestestedbyWhirlwind eCommerceWhirlwind eCommerce
PartsWarehouse Dark theme preview

PartsWarehouse Dark

PartsWarehouse Dark is a BigCommerce theme by Lonestar Templates ($225). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 60 for mobile speed and 93 for desktop speed, 54/54 for SEO and 76/77 for accessibility (mobile/desktop, 0–100).

Mobile66
PartsWarehouse Dark home page on mobile
Desktop98
PartsWarehouse Dark home page on desktop

Scores

MobileDesktop
Speed6093
SEO5454
Accessibility7677
Best practices7880

Single preset · measured 6 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.

Why not 100 — PartsWarehouse-Dark home page

Mobile

Speed 66 · 34 points to gain

  • −21.8 Largest Contentful Paint medium effort
  • −7.8 First Contentful Paint medium effort
  • −4.6 Speed Index medium effort
  • 450 ms Reduce unused CSS high effort
  • 450 ms Reduce unused JavaScript high effort

SEO 54 · 46 points to gain

  • −31 Page is blocked from indexing low effort
  • −7.7 Document does not have a meta description low effort
  • −7.7 Links are not crawlable medium effort

Accessibility 79 · 21 points to gain

  • −4.4 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
  • −3.1 `[aria-hidden="true"]` elements contain focusable descendents medium effort
  • −3.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
  • −3.1 Links do not have a discernible name medium effort
  • −3.1 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
  • −3.1 Touch targets do not have sufficient size or spacing. medium effort

Best practices 81 · 19 points to gain

  • −19.2 Uses deprecated APIs medium effort

Desktop

Speed 98 · 2 points to gain

  • −1 Largest Contentful Paint medium effort
  • −1 Speed Index medium effort

SEO 54 · 46 points to gain

  • −31 Page is blocked from indexing low effort
  • −7.7 Document does not have a meta description low effort
  • −7.7 Links are not crawlable medium effort

Accessibility 82 · 18 points to gain

  • −4.3 `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. low effort
  • −3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
  • −3 Links do not have a discernible name medium effort
  • −3 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
  • −3 Touch targets do not have sufficient size or spacing. medium effort
  • −1.3 Document does not have a main landmark. medium effort

Best practices 81 · 19 points to gain

  • −19.2 Uses deprecated APIs medium effort

Presets and pages

Preset / pageSpeedSEOA11ySpeedSEOA11yTested
mobiledesktop
PartsWarehouse-Dark default demo ↗ 605476935477 2026-09-12
category 755481965478 2026-09-12
home 665479985482 2026-09-12
product 385469865472 2026-09-12

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PartsWarehouse Dark: mobile speed 60 on Themestested
<a href="https://themestested.com/theme/bigcommerce/partswarehouse-dark"><img src="https://themestested.com/badge/bigcommerce/partswarehouse-dark.svg" alt="PartsWarehouse Dark speed score on Themestested" height="20"></a>

Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.