put colours in variables rather than hard coded in components

src/app/aboutus/aboutus.component.css

src/app/accountinfo/accountinfo.component.css

src/app/accountinfo/accountinfo.component.html

src/app/app.component.css

src/app/contactus/contactus.component.css

src/app/job/job.component.css

src/app/joblist/joblist.component.css

src/app/joblist/joblist.component.html

src/app/launch-dialog/launch-dialog.component.css

src/app/launcher/launcher.component.css

src/app/launcher/launcher.component.html

src/app/ourservices/ourservices.component.css

src/app/settings/settings.component.css

src/app/strudelapplist/strudelapplist.component.css

src/app/strudelapplist/strudelapplist.component.html

src/styles.scss