Information on Color Reference Data

The latest list includes 501 different colors. 500 are from the X Windows Manual, and one (transparent) is added.

The Xlib reference book gives the following choices:

• DodgerBlue
• dodger blue

In addition, there are four shades listed, the first of which has the same RGB definition of Dodger Blue. This gives a third choice:

• DodgerBlue1

Finally, the implementation uses all lower case with no spaces. This gives more possibilities:

• dodgerblue
• dodgerblue1

All five of these names share the same RGB definition. (Note: not all colors allow for all five choices). The main term chosen for Epicentre is of the form:

• DodgerBlue

The other four are given in ref_code_alias.

There are cases where the four shades do not match the original definition. For example, AntiqueWhite is different than AntiqueWhite1. So these lead to the two instances:

• AntiqueWhite
• AntiqueWhite1

Whenever there are shades given, there are four. For example:

• DodgerBlue1
• DodgerBlue2
• DodgerBlue3
• DodgerBlue4

As mentioned, since DodgerBlue matches, DodgerBlue1, the four instances that are given as the ref_color instances in Epicentre are:

• DodgerBlue
• DodgerBlue2
• DodgerBlue3
• DodgerBlue4

Of course, the other "names" for the same RGB pattern are always given in ref_code_alias.

When a color matches a xxx2, xxx3, or xxx4, the xxxN is used. For example, YellowGreen has the same RGB as OliveDrab3. The instances in ref_color are

• OliveDrab1
• OliveDrab2
• OliveDrab3
• OliveDrab4

• LightSlateGray

and aliases will be:

• LightSlateGrey
• light slate gray
• light slate grey
• lightslategray
• lightslategrey

Also, there are 101 scales of gray (equal parts of RGB) defined. They vary from white = gray100 (100 percent white, 0 percent black) to black = gray0 (0 percent white, 100 percent black). Epicentre instantiates white, with gray100 as an alias for white, and black, with gray0 as an alias for black. It also instantiates gray1 -> gray99. In a few cases, these RGB values correspond to other named colors. For example, DimGray corresponds to gray41. In Epicentre, gray41 is the ref_color instance, and DimGray is an alias.