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CHAPTER 10 Highlighting Information in DataWindow Objects
DataWindow Designer User’s Guide 315
Sample numeric
calculation
To create cyan, you use blue and green, but no red. If you wanted to create the
most saturated (bright) cyan, you would use maximum amounts of blue and
green in the formula, which is indicated by the number 255 for each. The
following statements show the calculation:
red + 256*green + 256*256*blue
0 + 256*255 + 256*256*255
0 + 65280 + 16711680
16776960
Sample expression
using the RGB
function
The following expression specifies the brightest cyan:
RGB (0,255,255)
Notice that the expression specifies the maximum for green and blue (255) and
0 for red. The expression returns the value 16776960. To specify cyan, entering
the expression
RGB(0, 255, 255) is the same as entering the number 16776960.
Numbers and
expressions to enter
for the common colors
Table 10-2 shows the numbers and expressions to enter for some common
colors. The number and expression for a color are equivalent. You can use
either.
Table 10-2: Numbers and expressions for common colors
Color Expression to enter
Number
to enter How the number is calculated
Black RGB (0, 0, 0) 0 0 (no color)
Blue RGB (0, 0, 255) 16711680 256*256*255 (blue only)
Cyan RGB (0, 255, 255) 16776960 256*255 + 256*256*255 (green and blue)
Dark Green RGB (0, 128, 0) 32768 256*128 (green only)
Green RGB (0, 255, 0) 65280 256*255 (green only)
Light Gray RGB (192, 192, 192) 12632256 192 + 256*192 + 256*256*192
(some red, green, and blue in equal amounts)
Lighter Gray RGB (224, 224, 224) 14737632 224 + 256*224 + 256*256*224
(some red, green, and blue in equal amounts)
Lightest Gray RGB (240, 240, 240) 15790320 240 + 256*240 + 256*256*240
(some red, green, and blue in equal amounts)
Magenta RGB (255, 0, 255) 16711935 255 + 256*256*255 (red and blue)
Red RGB (255, 0, 0) 255 255 (red only)
White RGB (255, 255, 255) 16777215 255 + 256*255 + 256*256*255 (red, green, and blue
in equal amounts at the maximum of 255)
Yellow RGB (255, 255, 0) 65535 255 + 256*255 (red and green)