Agender people have no specific set of pronouns singular they is typically used, but it is not the default.' 'The four-stripe agender flag is an homage to the original, widely-used seven-stripe agender flag created by Salem in 2014. They're similar in color scheme (black, gray, white, green). However, the new flag has a deliberately higher-contrast design with fewer stripes and emphasizes solidarity of agender people who may also be lesbian, gay, bi, nonbinary, trans, ace, etc.
By representing agenderness in one stripe.