#2017 Added useage of theme variable requirementTextColor

src/diagrams/requirement/styles.js

@@ -20,6 +20,10 @@ const getStyles = options => `
     stroke: ${options.requirementBorderColor};
     stroke-width: ${options.requirementBorderSize};
   }
+  
+  .reqTitle, .reqLabel{
+    fill:  ${options.requirementTextColor};
+  }
   .reqLabelBox {
     fill: ${options.relationLabelBackground};
     fill-opacity: 100%;