Color Spec Refactor

  Controller:
    create color controller spec

  Factory:
    refactor sku sequence to use ternary

  Model:
    enforce one expectation per example

  Views:
    _form.html.erb_spec.rb: use expect_field_within_form_helper
    _form.html.erb_spec.rb: enforce one expectation per example
    _form.html.erb_spec.rb: refactor out setup into before block
    _table.html.erb_spec.rb: enforce one expectation per example
    edit.html.erb_spec.rb: move setup into before block
    index.html.erb_spec.rb: enforce one expectation per example
    index.html.erb_spec.rb: remove double quotes with no interpolation
    new.html.erb_spec.rb: refactor setup into before block