Hyphens vs. parentheses in form field labels

Link Color
Link Color - Hover

Header Items - Left
Header Items - Right

vs.

Link Color
Link Color (Hover)

Header Items (Left)
Header Items (Right)

vs.

Link Color
Link Hover Color

Header Left Items
Header Right Items
  1. Are there any rules?
  2. Should I just strive for consistency?

NOTE: In the backend, the project (page builder) has variables like header_items_left and header_items_right.

Tags: , , , , , ,