Generated by SassMeister.com.

input.scss

div {
    color: lighten(#a00, 10%);
    background-color: darken(#a00, 20%);
}
    

output.css

div {
  color: #dd0000;
  background-color: #440000;
}

settings.json

{
  "sass": {
    "compiler": "dart-sass/1.26.10",
    "extensions": {},
    "syntax": "SCSS",
    "outputStyle": "expanded"
  },
  "autoprefixer": false
}