More than 300 participants are expected to take part in a hackathon with an overriding theme of driving more African Americans and Latinos into the tech world's recruitment pipeline. "Communities of color have to bear responsibility for not making this our No. 1, 2 and 3 priority and pointing our kids to these opportunities," said Jones, who will speak at a Saturday evening reception along with Kimberly Bryant of Black Girls Code and Mitch Kapor, inventor of Lotus, who now focuses on race in tech at his Kapor Center for Social Impact. There isn't just a wealth disparity gap in the technology world, advocates say; there's a racial gap and an opportunity gap that starts widening as soon as kids are old enough to grip a mobile device. [...] while the Silicon Valley regional economy was struggling back to health between 2009 and 2011, white men saw their incomes rise by 4 percent while African Americans saw theirs plummet by 18 percent, according to the 2013 Silicon Valley Index. Only 6 percent of U.S. tech workers are African American and 7 percent are Latino; 15 percent are Asian American and 71 percent are white, according t0 2011 census data. Despite its claims of meritocracy, tech's demographic breakdown is comparable to the white-collar finance and insurance industries, according to 2012 data from the U.S. Equal Employment Opportunity Commission. Five companies - Apple, Google, Hewlett-Packard, IBM and Intel - successfully petitioned the Department of Labor in 2012 to not disclose their demographic breakdowns, claiming it would cause "competitive harm." [...] while Twitter drew fire last year after its public filing revealed its board of directors was all white and all male, few top valley companies have more than one or two women or people of color on their boards.