use css instead of sass variables for colors
Before this change sass variables were used to define the colors used in this app. While sass variables allow easy color modification they inhibit dynamic color changes since their values will be compiled into css. Changing colors at runtime is possible with css variables but further modifications were necessary since darken, lighten and fade-out sass functions don't work with css variables. With the hsl representation of colors these color modifications can be performed at runtime.
Showing with 70 additions and 30 deletions