Agreed with Bruno.
Additionally your yellow boxy things(?) are too desaturated to fit in with the rest of the set--either lower the contrast on the grey stuff or increase it on the yellow.
Finally the tiling is really noticeable. I think your grating would do better as an autotile, with the slats taking up an entire tile and the outskirts of it are lined in a metal border, rather than every tile having a metal border. As it is, it looks kinda like dozens of those square floor drains.
You know I think you're awesome though <3