Need some help with colors

I would like to reference a post put up some time ago here:

In the pictures posted there, you can see the color scheme is pretty much a dark purple color, but it has highlights that are pretty close to the same hue. What I’m looking to do is emulate that effect. Is there a way one can use a standard terrain then apply that color purple without turning everything just one solid color? I apologize if this is a repeat question, but I looked for an answer to this/experimented for most of the morning without any luck. Thank you.

You can try using a color pallet program to extract the most common shades and colors. Kuler is a great online program that can take an image and extract a base color set for you. below is the link…
https://kuler.adobe.com/create/color-wheel/