NC 25 - Theme-Colored Folder-Icons

[SephGER]

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Is your feature request related to a problem? Please describe.
In the new NC25-Theme the thumbnail foldericons have a static greyish color. With this change the themes primary color could be used.

Describe the solution you'd like
Switch from the background-image css property to a combination of mask-image and background-color

Describe alternatives you've considered
Having multiple icon-sets which could be chosen

Drawbacks
If this is used globally for all icons the mime-type specific css would need additional background-color properties either fixed or via theme settings

Additional context

mask-image: url(/apps/theming/img/core/filetypes/folder.svg?v=16);
background: var(--color-primary);
mask-size: contain;

Right now:

With mask-image:

CSS-Change in Browser:

[Jerome-Herbinet]

Probably the same problem as the one I detailed in this issue : #34578

[szaimen]

I can confirm this issue:

[szaimen]

cc @nextcloud/server-frontend

[SephGER]

Probably the same problem as the one I detailed in this issue : #34578

I just tried an reset the theme color to the default and now the folder color changed to another color that suits the bg-image. The #396475 color from before was after upgrading from 24 and having a custom color set in the global design settings. After setting the design color to a custom value again the folder color keeps the last color that was applied by the bg-image.

So it should either always be set with the bg-image and/or give the admin the possibility to set it to a static theme-color (or even a custom color field alongside the theme color?)