Prism

Prism is built around a simple idea: no two members have to see the same forum. A small palette button in the corner lets every visitor pick their own header color and accent, in dark or light, and the whole board follows along. Lots of combinations, remembered on their device, no settings page in sight.

The look itself takes its cue from the name. A faceted, gem-like artwork runs across the header and category bars, and a thin band of refracted light threads through the details: the top of the footer, the avatar rings, the loading bar. Your featured category becomes a mosaic of cover artworks, wide tiles and banners instead of a plain list, and each forum can carry its own scene.

Underneath it stays a proper forum. Clean rows, readable columns, a full footer that feels like a homepage, and small touches you notice on the second visit rather than the first. Prism is the flagship theme for communities that want to look like nowhere else without their members having to learn anything new.

Six different covers that you can point to a forum ID to show as a card instead of normal forum list (found at the bottom of custom css, adjust the forum-id):

body.pr .forumlist > .b2-cat:first-of-type .b2-forum#forum-90001::before { background-image: var(--pr-cover-1) !important; }