Steps to be follow for theme colors with the template:
scss/_variables.scss
file.
Here is the Change color of template in gulp+scss+hbs
const color = {
primary:{
100: "#d8ddfa",
.
.
},
secondary:{
100: "#f8f9fa",
.
.
},
success:{
100: "#d1ecdd",
.
.
},
.
.
.
}