Eureka Theme
Theme Main Colors
Theme Colors Customization
There are two ways to customize theme main colors. One way is to change primary and secondary theme color variables in the colorscheme-[yourcolorshceme].less file. This method will require you to re-compile the state template, you can find instructions in the readme file. After the compilation you will have updated colorscheme-[yourcolorshceme].css file.
Another way is to manually find and replace all main theme colors and their variations in colorscheme-[yourcolorshceme].css. Main theme colors classes will be listed at the top of the CSS file. You can copy their values and use find/replace feature in your web editor software to replace all those colors references with your custom colors throughout entire css file.
Note: Before changing your colors make sure that your custom theme colors have sufficient color cotrast ratios.