css - Make the value of the course type a unique color using rails -

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i have different courses , want add unique color different types of courses. ex video course, reading course , speaking course.

i understand code does. ask if type_of_course "video" in present, , is, how display "orange" color courses have "video" course type? 

<% @courses.each |course| %>      <td class='<%= "type_of_course" if course.type_of_course? %>'>      <%= course.title %> <% end %>

courses.scss 

.type_of_course {     color: orange; }

course.rb 

def type_of_course?     type_of_course = course.find_by(type_of_course: 'video').present? end

sorry bad explanation. figured out after few hours! anyway! :) 

.level-easy .level {   	background-color:green;   	text-transform: uppercase;  	width:   }  .level-medium .level {   	background-color:orange;   }  .level-hard .level {   background-color:red;     }

<tr class='level-<%= course.level %>'>  <td class="text-center level"><%= course.level.upcase %></td>


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