A TextColor encodes a text color change applicable over a given range of text.

	comparing
	= hash

	printing
	printOn:

	scanning
	dominates: emphasizeScanner: writeScanOn:

	instance creation
	color: scanFrom:

	accessing	top
	color
	color:

	comparing	top
	= Answer whether the receiver and the argument represent the same object. If = is redefined in any subclass, consider also redefining the message hash.
	hash Answer a SmallInteger whose value is related to the receiver's identity. May be overridden, and should be overridden in any classes that define =

	printing	top
	printOn: Append to the argument, aStream, a sequence of characters that identifies the receiver.

	scanning	top
	dominates: Subclasses may override condense multiple attributes
	emphasizeScanner: Set the emphasis for text display
	writeScanOn: Two formats. c125000255 or cblue;

	constants	top
	black
	blue
	cyan
	green
	magenta
	red
	white
	yellow

	instance creation	top
	color:
	scanFrom: read a color in the funny format used by Text styles on files. c125000255 or cblue;