Change full colors to a more harmonious palette

app/assets/stylesheets/framework/buttons.scss

app/assets/stylesheets/framework/dropdowns.scss

app/assets/stylesheets/framework/forms.scss

app/assets/stylesheets/framework/header.scss

app/assets/stylesheets/framework/icons.scss

app/assets/stylesheets/framework/issue_box.scss

app/assets/stylesheets/framework/layout.scss

app/assets/stylesheets/framework/lists.scss

app/assets/stylesheets/framework/tw_bootstrap_variables.scss

app/assets/stylesheets/framework/variables.scss

app/assets/stylesheets/pages/boards.scss

app/assets/stylesheets/pages/issuable.scss

app/assets/stylesheets/pages/issues.scss

app/assets/stylesheets/pages/login.scss

app/assets/stylesheets/pages/merge_conflicts.scss

app/assets/stylesheets/pages/merge_requests.scss

app/assets/stylesheets/pages/milestone.scss

app/assets/stylesheets/pages/notes.scss

app/assets/stylesheets/pages/pipelines.scss

app/assets/stylesheets/pages/profile.scss