The values for the patterns in the Line Pattern and Fill Pattern palettes are numbered consecutively, starting with the top row and counting from left to right, where the value for the pattern in the top left corner is 1. The values end at the bottom right corner with number 64. Five patterns in the first row can also be defined with words: NONE (= 1), SOLID (= 2), DKGRAY (= 6), GRAY (= 7), and LTGRAY (= 8).
Themes should use web-safe colors for databases that will be accessed by multiple platforms, displayed on monitors with varying resolutions, or displayed on a network. However, when your databases will be displayed on a single platform or at a high resolution, the full RGB color spectrum gives you a much larger and richer color set.