The default font for iOS is San Francisco (SF). San Francisco has two variants: SF Pro Display and SF Pro Text. SF Pro Display is used for font size 20 pts or above whereas SF Pro Text is used for font size 19 pts and below. Font color variants used in Fiori for iOS cover both Light and Dark modes in the iOS platform. The contrast variants are added to allow any usages of dark backgrounds in the Light mode. To learn more about typography, see the iOS Human Interface Guidelines.