Propose a method for generating a color band similar to the one shown in the zoomed sectio...

Propose a method for generating a color band similar to the one shown in the zoomed section entitled Visible Spectrum in Fig. 6.2. Note that the band starts at a dark purple on the left and proceeds toward pure red on the right. (Hint: Use the HSI color model.)

FIGURE 6.2 Wavelengths comprising the visible range of the electromagnetic spectrum. (Courtesy of the General Electric Co., Lamp Business Division.)