Epson ChromaBlast v1.0 Getting Started Manual page 38

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You may alter the chosen start color's CMYK value by selecting
two or three Step Colors. Using multiple step colors will present
you with a greater range and variety of colors to choose from.
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Custom Palette Utility
For instance, if you choose to modify your Start Color
with two steps, then Step Color 1 will change its values
on the X (horizontal) axis and Step Color 2 will change
its values on the Y (vertical) axis.
Color Finder Palette with two Step Colors
ChromaBlast Getting Started Guide for the EPSON Stylus Pro 4880
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