setting an appropriate text color for categories with dark backgrounds.

src/main/java/mi/hdm/TastyPages.java

src/main/java/mi/hdm/components/CategoryCheckBox.java

src/main/java/mi/hdm/components/CategoryPreviewLabel.java

src/main/java/mi/hdm/controllers/BaseController.java

src/main/java/mi/hdm/controllers/ColorHelper.java

...main/java/mi/hdm/controllers/RecipeCreatorController.java

src/main/java/mi/hdm/filesystem/FileManager.java

src/main/resources/fxml/recipe-creator.fxml