Color theory primary colors work at all is that the imperfect pigments being used have sloped absorption curves, and thus change color with concentration. A pigment that is pure red at high concentrations can behave more like magenta at low concentrations. This allows it to make purples that would otherwise be impossible. Likewise, a blue that is ultramarine at high concentrations appears cyan at low concentrations, allowing it to be used to mix green. Chromium red pigments can appear orange, and then yellow, as the concentration is reduced. It is even possible to mix very low concentrations of the blue mentioned and
Moving to Opportunity Moving to Opportunity Moving to Opportunity for Fair Housing (MTO) was a randomized social experiment sponsored by the United States Department of Housing and Urban Development (HUD) in the 1990s among 6969 low-income families with children living in high-poverty public housing projects. Families who volunteered to participate in the program were randomly assigned to 3 groups. One group received housing vouchers that could be used only in low-poverty areas for the first year as well as counseling to help them find units there. After a year, they could use their vouchers anywhere. One group received vouchers that could be used