You can give buttons and fields colors and color pictures.
Buttons can have color icons.
You can cut, copy and paste color pictures and icons to and from the clipboard. You can move fields and buttons in color. The information about the color properties is stored within the buttons and fields, so eg. As a side effect, trueColor is no longer slow in HyperCard 2.2 on PowerMacs that have Connectix SpeedDoubler installed. The screen is now locked before going from card to card.