Overlooking
From The Lost Media Wiki
I don't want to sound rude here, but if you read every reply to Ratchet's post, you'll see that he talked about the fact that un ángel sin luz is the softened remake of Los colores del cielo and that the original version is still lost. Also, IMDb says that un ángel sin luz came out in 1998, but I don't know if this is true.