You may want to keep your favourite block textures or other packs while still getting dark modded menus. Resource packs can be stacked, but order decides which pack wins when two of them change the same thing.
Setting up a stack that keeps the dark menus
1. Open Options → Resource Packs.
2. Move all the packs you want into the Selected list.
3. Arrange them so the Utopia Extension sits near the top and the main Dark mode pack sits directly beneath it.
4. Put texture packs that only change blocks, items or mobs below the two dark packs. These normally do not touch menus, so they will not interfere.
5. Click Done and let the game reload.
Handling packs that also change menus
Some packs restyle the interface too. If one of them sits above the extension, it can undo the dark screens for your mods.
- If you prefer the dark look, move the other interface pack below both Mandala packs.
- If a specific menu turns bright after adding a new pack, that new pack is likely replacing it. Try removing it temporarily to confirm.
Shaders
Shaders run through a loader such as Iris or OptiFine and are managed separately from resource packs. They change in-world lighting, not menu textures, so your dark screens stay the same with shaders on or off.