Frost
WP Engine · Free · 5/5
A block theme with a large pattern library aimed at agencies building with full site editing.
Sp
Spectra One
by Brainstorm Force
A modern block theme designed alongside the Spectra block library for editorial and business sites.
4.8Block themeFree
This link may earn us a commission. It never changes our rating.
What Spectra One is
A modern block theme designed alongside the Spectra block library for editorial and business sites.
It sits in the block theme part of the theme market and is sold by Brainstorm Force on a free basis. A theme decides your layout, your typography and a large slice of your page weight, so it is the hardest thing on a WordPress site to change later.
Before you commit, record a speed test of your current site, then run the same test after you switch, on the same page, so you can see exactly what the new theme costs you.
What Spectra One looks like
The official screenshot from the WordPress.org theme directory, as published by the theme authors.
See it running on a live demo site at the WordPress.org preview.
Real user ratings
Score
4.8/5
Reviews
28
Active installs
8,000+
Downloads
234K
Latest version
1.2.6
Last updated
2026-08-25
Figures come straight from the public WordPress.org theme directory API for version 1.2.6. You can check them yourself on the WordPress.org listing.
Where Spectra One ranks elsewhere
Spectra One does not appear in the published "best of" lists we track from WPBeginner, TechRadar, Kinsta, Themeisle and similar sites. That is not a mark against it - those roundups are short and skew towards the biggest names.
What changed in the latest version
v1.2.6Latest release
- Improvement: Compatibility with WordPress 7.1.
v1.2.5
- Fix: Abilities API - Navigation menu updates applied via AI-assisted theme management now preserve your existing menu styling and any non-link blocks such as search or social icons, and work correctly on a fresh install.
- Fix: Abilities API - Color palette updates now merge with your existing custom swatches instead of replacing them, and no longer reset heading typography.
- Fix: Abilities API - Template part updates no longer overwrite blocks you have customized, and your Global Styles are left untouched when the saved styles cannot be read.
v1.2.4
- Fix: Updating to 1.2.3 could wipe Global Styles customizations. The theme no longer modifies your saved Global Styles, so this cannot happen again.
- Fix: Changing colors or typography through AI-assisted theme management no longer clears your saved Global Styles.
Release notes are the developer's own words, published on WordPress.org. Read the full changelog
Pros and cons
- Well-judged typography and spacing defaults for block editing.
- Rated 4.8 out of 5 by 28 WordPress.org reviewers.
- There is a free version you can trial before paying.
- Works with the block editor and the mainstream page builders.
- It expects Spectra blocks for anything beyond core layouts.
- Switching themes later means rebuilding page layouts, so choose deliberately.
How to use it
- 1Install the theme from Appearance > Themes, then activate it on a staging copy first.
- 2Create a child theme or use the theme's own custom CSS panel so updates never overwrite your work.
- 3Set global colours, fonts and container width before you build any pages.
- 4Import a starter layout if one fits, then strip out demo sections you do not need.
- 5Replace demo images with compressed WebP versions sized for the slot they sit in.
- 6Run a before and after check on our speed test so you can see the real page cost.
How it compares
Other block theme themes we recommend, with their public WordPress.org score where one exists.
| Theme | Rating | Reviews | Pricing | Best for |
|---|---|---|---|---|
| Spectra One | 4.8/5 | 28 | Free | Well-judged typography and spacing defaults for block editing. |
| Frost | 5/5 | 6 | Free | Patterns cover most marketing sections out of the box. |
| Ollie | 5/5 | 36 | Freemium | The setup wizard produces a usable site in minutes. |
| Raft | 4.9/5 | 48 | Freemium | Very small asset footprint for a full site editing theme. |