A six-stripe rainbow flag with a single black stripe added at the bottom, used during the height of the AIDS pandemic to mourn those lost to AIDS and to stand with people living with HIV. Located secondary sources attribute the flag's origin to an unnamed San Francisco organization in the 1980s; no individual designer is named in any located source. Sgt. Leonard Phillip Matlovich (Vietnam War veteran, 1943 to June 22, 1988) is consistently credited as the flag's most public advocate and as the author of a directive that the black stripes be ceremonially burned in Washington, D.C. once a cure for AIDS was found. Matlovich's role is symbolic and ritual, not authorial; no located source names him as the designer. The flag's black stripe is a direct ancestor of the black stripe in the Philadelphia Pride Flag (2017), the Progress Pride Flag (2018), and the Intersex-Inclusive Progress Pride Flag (2021).

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