Everything was brown colored in the fall

[ROBINDESBOIS]

Is it OK¿

[Perikles]

Is it OK¿I can´t speak for the other side of the Atlantic, but in the UK it would be

Everything was coloured brown in autumn.

Note spelling and vocabulary.

[Rusty]

What you wrote is fine over here, except that the adjective should be hyphenated.

Everything was brown-colored in the fall.