Fluent Theme for muOS Goose/Jacaranda

A brand new theme made with Microsoft's Fluent Design principles in mind, but with some tweaks to make sure it fits the capabilities of handhelds and muOS. This slick, simple and modern theme comes with support for every resolution handled by muOS, new icons from Fluent Icons set, content and application grid mode support and, as always, Polish version built-in.

Variants: Light, Dark, Purple.

Note

This version uses the new way of including grid icons that came with the Canada Goose version (more info here: https://community.muos.dev/t/including-grid-and-box-art-images-for-your-theme-in-canada-goose/825).

Therefore, this theme is incompatible with prior versions of muOS!

License

You're free to use this theme and its assets as a base for your theme. I'll be happy if you mention this theme if you publish it. Thanks!

Updates

Update 2025-09-26

Added Korean translation (thanks @pipi0935)

Update 2025-09-27

Minor tweaks to counter and notification styling

Update 2025-09-28

Changed glyphs for power settings
Added missing glyphs for web services

Update 2025-10-02

Updated bar's border to be more visible

Update 2025-10-04

Added support for a simple, imageless grid in collections (can be disabled by putting a .nogrid file in /MUOS/collection folder)
Removed unnecessary header from muxlaunch images

Update 2025-10-05

Added missing icons from Silly Goose update

Update 2025-10-06

Added more new icons from Silly Goose

Update 2025-10-07

Fixed sizing of Scrappy icon

Update 2025-10-09

Added redundant system icons for compatibility

Update 2025-10-11

Added remaining icons for upcoming Silly Goose

Update 2025-10-12

Added default app icon

Update 2025-10-17

Added bigger fonts for bigger resolutions
Added bigger icons for bigger resolutions
Added bigger grid icons for apps and systems for bigger resolutions

Update 2025-10-19

Changed default font size on 480p devices from 20 to 19 to shave off a couple of pixels of width from header titles
Added French translation (thanks @chronoss0109)

Update 2025-10-22

Updated font size for main menu screens. It will be bigger for resolutions other than 720x720
Made app and system grid icons bigger for most resolutions

Update 2025-10-23

Minor tweaks to grid icon size

Update 2025-10-24

Added purple variant

Update 2025-10-29

Added Portuguese (BR) translation (thanks MelquiM)
Added alternate JP icons for Nintendo and Sega systems

Update 2025-10-30

Added Spanish translation (thanks @daas88)

Update 2025-11-17

Added more icons for upcoming muOS release
Increased size of main menu icons to better correspond to the ones in Apps menu

Update 2025-12-03

Added missing icon

Update 2026-01-11

Added new icons for Jacaranda

Update 2026-01-15

Grid views now come with pre-colored images to allow usage of grid mode for games; recoloring of grid images was disabled

Update 2026-01-24

Added new icons for muOS Jacaranda
Added Italian language (thanks, ENiGMiST4)
Switched the clock and the screen title alignments. Previously some menus had titles that were extremely long and would overlap with the clock when the clock was centered. When title is centered, this no longer happens. ~~So, screenshots below are outdated. I'll update them later.~~