I love looking at @wesbos' Theme for sublime text. So, I made my own.

Atom Theme

// This theme is based on https://medium.com/@docodemore/an-alternative-to-operator-mono-font-6e5d040e1c7e#.nk01drf9k

// I am using Cobalt2 for the Syntax Theme and One Dark for the UI Theme.

atom-text-editor {
  font-family: 'Fira Code';
  font-style: normal;
  text-rendering: optimizeLegibility;
}
  atom-text-editor::shadow {
  .string.quoted,
  .string.regexp {
    -webkit-font-feature-settings: "liga" off, "calt" off;
  }
  .source.js.jsx > .keyword.control.flow.js,
  .storage, .type .function, {
    vertical-align: baseline;
    font-family: 'Lobster Two', cursive;
    height: inherit;
    font-size: 1.2em;
    line-height: 1rem;
  }

  .comment {
    font-family: "Lobster Two", cursive;
    font-style: italic;
    letter-spacing: 1px;
  }
  .source.js.jsx,
  .storage.type.function.arrow.js,
  .variable {
    font-family: 'Fira Code';
    font-style: normal;
  }
  .string.unquoted.js {
    color: #CDD3DE;
  }
  .entity.name {
    font-weight: normal;
  }

}