Color Color Color (American English), or colour (Commonwealth English), is the characteristic of human visual perception described through color "categories", with names such as red, orange, yellow, green, blue, or purple. This perception of color derives from the stimulation of cone cells in the human eye by electromagnetic radiation in the visible spectrum. Color categories and physical specifications of color are associated with objects through the wavelength of the light that is reflected from them. This reflection is governed by the object's physical properties such as light absorption, emission spectra, etc. By defining a color space, colors can be identified numerically
Judo in the United States wrestling. Although Yoshiaki threw him time after time, Graft continued to get up. Finally, Yoshiaki decided that he would do mat work with Graft, since there seemed to be no end to the match. Yoshiaki got an armlock on Graft, but the wrestler would not give up. Yoshiaki kept up the pressure until Graft groaned as his arm came close to breaking. President Roosevelt was impressed and took judo lessons. After leaving office, he kept mats in his home. He studied judo for about a year, earning a brown belt. Through the help of the president, Yoshiaki taught judo at