Okay it has been more than 15 years since I have seen this and I cannot find it anywhere. I watched it on TV in the early 90's and from what I remember, it was a race of slaves that were trapped underground. One of them starts a revolution and convinces them to escape with him. I do not think they were human - weird looking. At the end, they find the exit of the underground maze and see daylight for the first time. Any ideas? Thanks!

Possibly,.

Dreaming of Paradise(87)
a.k.a. Strit og Stumme

In the future mankind moves underground to escape the polluted surface. Centuries pass and the surface becomes merely a myth. A group of children embark on a journey through the tunnels to find the surface to find if it exists

Unbelievable. Thank you SO much. This has been haunting me for years. Thank you!