Former Celtic defender Paul Elliott is urging clubs and governing bodies to "step up" and increase the level of ethnic minority representation at the top of their organisations.
The Black Lives Matter protests, sparked by the death of George Floyd in the United States last month, have been given prominence in football.
The slogan appears in place of player names on the back of English Premier League club shirts and players took the knee prior to Wednesday night's top-flight matches at Aston Villa and Manchester City.
But Elliott says all of that will be "an empty gesture" if it does not lead to a change in how ethnic minorities are represented within football, and has called on clubs and administrators to adopt the voluntary Equality In Football Leadership code.
Elliott, who is the chair of the Football Association's inclusion advisory board, says he will work with other senior black leaders in the game to work on the details of the code, but the idea will be that it can create meaningful targets to improve representation.
He said the FA's chairman Greg Clarke had already agreed to review the composition of the national governing body's Council, as well to revisit the FA's "lack of BAME leadership".
"The FA board is diverse with four women and one BAME director. I attend as an observer in my role as the chair of the FA inclusion advisory board to ensure that diversity and inclusion issues are fully represented at every meeting, however I do not have a vote.
"We need the Premier League, EFL, Women's Super League and the National League to step up and provide ethnic diversity at board and executive level too. We need more role models for young BAME people beginning their careers to draw inspiration from."
A number of high-profile names from within the sport put their names to Elliott's letter, including the managers of England's senior men's and women's teams, Gareth Southgate and Phil Neville, Match of the Day presenter Gary Lineker and Sky and BBC pundit Alex Scott.
"Don't be silent. Football must unite against inequality. Join in and make football and society fair for all," Elliott added.
"Football is coming together to ensure this initiative gains genuine traction rather than be another opportunity for making speeches and hand-wringing."
Manchester City and England forward Raheem Sterling has been vocal about the lack of black leadership figures in the sport.
There are currently no black owners, chairs or chief executives at any of the 91 English Premier League or EFL clubs.