The range of values for Red, Green, and Blue is generally between 0.0-1.0, with 0.0 being the perfect absorber (black) and 1.0 being the perfect diffuser (white). Radiance RGB values are not comparable to other RGB formats. The RGB may be thought of as a three-point sample of the radiometric spectral content of the material. While it is physically possible to have one of the components greater than one (such as fluorescent materials) the reflective average should not be allowed to exceed 1.0. (see Physical Properties, below). Click the "Pick Color" button to display the standard windows color palette (Color). Click "Define Custom Colors" to display the HSV color picker. This standard color picker may be used to approximate the color of your surface. Click "add" to add this color to your palette. Select this color on the left hand side of the color picker and then click OK. The RGB and average reflectance of the color you have created will then be displayed. If the average reflectance is incorrect, the value may be changed and the resulting RGB values will be updated.
Figure 4. Color Picker
