
Hey Karen,
Beans is build with the Uikit 2 framework which has a contrast class to start: https://getuikit.com/v2/docs/contrast.html
Another way would be to to edit the variables in the style.less file: https://github.com/uikit/bower-uikit/blob/master/less/uikit-variables.less

Thank you, Kamron. I will look into this.