The tone in Langston Hughes's “I, Too” can be described as determined because the speaker intends to have equality someday.
This is echoed by the desire of Mr. Hughes to be free from the shackles of oppression and inequality to becoming a free man and an equal among other men.
The line that shows the value of the match its the second one "…it was a long, long time before they learned how to kindle one easily". The match allows humankind to handle fire easily.