Does a commander's text box count toward its color identity if a mana symbol appears in reminder text?

A commander's color identity is determined by its mana cost and any mana symbols that appear in its rules text (oracle text). However, the Comprehensive Rules explicitly exclude reminder text from this calculation. CR 903.4 defines color identity and states it is built from the card's color indicator, mana cost, and mana symbols in its rules text — but CR 207.2c clarifies that reminder text (italicized text in parentheses explaining a keyword) is not considered part of the card's rules text for such purposes.

The most famous practical example of this is the Extort keyword, which has a white/black Phyrexian mana symbol in its reminder text. Cards with Extort (e.g., Blind Obedience) do not gain white or black to their color identity solely because of that reminder text symbol. A colorless or mono-colored commander with Extort in its reminder text would not be forced into a two-color identity.

This is an important distinction because reminder text is purely explanatory — it tells you how a mechanic works but carries no rules weight for color identity. Only mana symbols that appear in the actual functional oracle text (outside of reminder text parentheses) contribute to color identity.

For example: if your commander is a mono-green card but has Extort as a keyword (with its white/black reminder text), your deck is still only restricted to green cards. The reminder text symbol is ignored for identity purposes.

Citations: CR 903.4 (color identity definition), CR 207.2c (reminder text is not rules text for color identity), and the Commander Rules Committee official FAQ, which aligns with this reading of the Comprehensive Rules.