Best effects on camera nikon or olympus?

Which camera of either brand is best for its effects? Like really vivid colours, bright and like really light backround and bright foreground and stuff also black and white and speia and stuff.

Ugh, most of those "effects" are done on computer software, not in the camera.

I visited digicam center. I show sony, olympus, nikon, canon, fujiflim, panasonic, samsung… Almost all brand but among them all nikon has best ever quality…

You are better adding such effects after you've transferred your photos to your computer. If you really must know though, the difference is quite minimal. There are actually very few companies that manufacture the photo-sensors and image processors, so it's quite common for different brands to use the same combination of chips.