The theme can be easily customized to color scheme of your preference. Here's how you can do it.

Dark color scheme

Step 1

The theme uses gulp and nodejs for the development purposes. You'll need Gulp and Nodejs installed globally. After that from the theme's root directory run the following commands.

$ yarn install 
$ yarn dev

Step 2

Open up the assets\src\styles\partials\_variables.scss file. It looks something like this -

/* COLOR SCHEME: GREEN-BLUE */
    $color-primary: limegreen;
    $color-secondary: cornflowerblue;
    $color-text: #191919;
    $color-text-lighter: #575757;
    $color-links: #2196F3;
    $color-background: white;
    $color-navbar: white;
    $color-background-drawer: white;
    $color-drawer-active-link: #f3eeee;
    $color-postcard-background: whitesmoke;
    $font-primary: Helvetica, Arial, sans-serif;
    $font-secondary: 'Oswald', Helvetica, sans-serif;

/* COLOR SCHEME: DARKBLUE-GREEN */
/* Uncomment the following code to activate this theme.
    $color-primary: #8BC34A;
    $color-secondary: cornflowerblue;
    $color-text: white;
    $color-text-lighter: white;
    $color-links: #6bbdff;
    $color-background: #000627;
    $color-navbar: #384052;
    $color-background-drawer: #384052;
    $color-drawer-active-link: #2d313c;
    $color-postcard-background: #565f73;
    $font-primary: Helvetica, Arial, sans-serif;
    $font-secondary: 'Oswald', Helvetica, sans-serif;
*/

Now just edit the color shades or uncomment the code for the theme you want to use.

Step 3

From the root directory run the following command.

$ yarn build

Done !

you can find your customized theme in the dist directory