Blue Utopia website system allows you to customize your colors and css files fairly extensively.
The first and easiest method to customize your colors is through our LESS variables system. This system allows you to define your specific colors -- for example, your primary site color. An engine then goes through all of your css files and sets all instances of your 'primary color' to your chosen color.
To customize your colors using the LESS variables, go to the website configuration area and select 'Customize basic site variables'
This will open a page with 20-30 variables.
Simply change to 6-digit hexadecimal colors and click save. Be sure to refresh your website to view the changes. Repeat this process until you get the desired colors.
The second way to control your CSS files is manually editing your CSS files. This is advised only for advanced users. Steps are here: https://blueutopia.zendesk.com/knowledge/articles/115003530391