Oki C3450m User Manual page 64

An example of using the Colour Swatch function:
You wish to print a logo in a particular shade of red. The steps
you would follow are:
1. Print a colour swatch, then select the shade of red that
best suits your needs.
2. Take a note of the RGB value for the particular shade that
you liked.
3. Using your program's colour picker, enter these same
RGB values, and change the logo to that colour.
The RGB colour displayed on your monitor may not necessarily
match what was printed on the colour swatch. If this is the case,
it is probably due to the difference between how your monitor
and printer reproduce colour. Here, it is unimportant since your
primary objective is to print the required colour.
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Colour Printing > 64