The floor looks great at first, but after a while it starts looking dull.

I started thinking about my life, which at a time like this naturally starts to look pretty dull and gray.

However, the floor starts looking dull when it is walked upon.

When the boy finally visits his father's office, it looks dull and ordinary.

The game began with both teams looking dull on offense.

You can't just paint the thing black because it will look dull.

I have tried many brands, but my hair often seems to look dull.

But even if the company looks dull, its immediate outlook is very strong.

Even the black eyes looked dull in this light.

It looked pretty dull to me, although I did not say so.