Epson BrightLink 450Wi Quick Manual page 24

After you select a color that you like, you can drag it from the color bar at the top
to one of the squares at the bottom of the dialog box. This allows you to save
favorite colors for later use. More squares are available, so that you can save up to
300 colors.
You can use the icons at the top of the screen to open other color selection dialog
boxes, based on sliders, color palettes, a spectrum, or a crayon box, as shown
below.
To display the following alternate color selection dialog boxes, click the icons at
the top of the screen.
Slider
Color palettes
Crayon box
Spectrum
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Using the Interactive Pens