In some NSMB and NSMBwii levels the color of the question blocks and bricks changes depending on the theme of the level.

For example, if the level is underground or a tower, the question blocks are blue, if the level is a fortress with lava, the question blocks are red and if the level is of snow the question blocks are grays

How can I make change the color of the question blocks and bricks depending on the theme of the level in a custom way? is it possible?

Here is a screenshot that these blocks are still blue but the level is of lava and I want them to look red

It depends on the bottom layer background

The bricks become blue on tower, underground and castle, brown on grassland and gray on snowy BGs

You would need to use a different bottom layer BG if you want the bricks in a different color, or otherwise you can use ASM patches
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actually, it depends on the bottom background, and you can change it relatively easily

edit: was slow and ktrm fixed his post