Custom Theme Colours In EasyBlog theme

I have tried using a custom colour theme in EasyBlog but can’t get it to work:

I am adding a custom version of the colour variables to the CSS tool like this (but with my new colours):
`html[data-theme=’custom’]“{
  –white: #FFFFFF;
  –black: #000000;
  –green: #317E91;
  –dark: #363D4D;
  –gray: #393E46;
  –light: #DED7D3;
  –lighter: #EDE9E6;
  –lightest: #FBF8F6;
  –color: #E2603D;
  –text-color:#212529;
  –headings-color: #363D4D;
  –button-color: #FFFFFF;
  –link-color: #E2603D;
  –link-color-hover: #363D4D;
  –cards-bg: #FFFFFF;
}`