The Mt. Lowe inspired micro-layout at year end

All the mountain shapes have been worked out, and their surfaces have been primed with gesso. In the new year it'll be on to painting a base layer with acrylics. Right now I'm trying to work out the mix of colours that best match Mt. Lowe's.

Studying my reference photos suggests the colours are a mix of coloured greys in the exposed rocky areas. Earth tones enter into the mix where rock, trails, and vegetation come together. It isn't the usual slathered on neutral grey one sees on many layouts' rock formations. I went through a similar exercise with the Loonar Module, but this time I don't have any rock samples for reference. I'm relying on photographs, which introduces another layer of approximation. Understanding what's going on colour-wise is taking awhile, but it's an interesting exercise.