Abstract
Red and yellow - these extremely noticeable colors are used to paint heavy forestry machinery to prevent personal injury arising from careless contact with such machinery. However, attention must be given to the best color scheme that will be easily noticed by everyone at the work site. In this research, we examined the changes that aging induces in color perception. Color vision characteristics were calculated for regular (younger) and older (70 years old) persons using POKORNY's "Two-Factor Aged Eye Model" and compared color samples collected from painted forestry machines with environmental colors at actual forestry sites. The results showed that aged people tended to view colors as grayish or drab, especially yellows and blues. Bright colors were seen as subdued. However, there was little decrease in aged people's perception of red and orange, which should thus be useful as "key colors" in color design.
