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By using a combination of PAPER; INK and UDG screens we can have an almost endless variety of colors.
Most color printing we see in magazines, packages etc. are printed using only four colors; cyan, yellow, magenta and black: These are called process colors.
The seemingly endless varieties are determined by a combination of screened and solid colors. The screens are percentages of the 4 Process colors. The following programs use similar but simplified features.
The first listing (C1) is from a Resistor Color code program I have developed. The screen dump shows the custom colors. Below are the UDG’s developed for this and the following program.
Note that Lines 407 to 411 use the combinations I noted above.
Color Blocks uses the same UDGs as the prior program. An endless chain of colors, hues and their shades can be seen. By changing or adding screens the range increases greatly.