Trying to find this fabric

Hi I bought this pattern but I’ve been having a really hard time finding this fabric to use for the pants. The person in the tutorial said they used a “summer denim” but the link to the store was in German. I want the pants to be tight fitting but I am planning on adding a zipper fly. I’m thinking maybe a light weight denim or perhaps a Lycra? Color matching has been very tough. If anyone has recommendations for where I can look I’m in need!