chroma.js includes colors from colorbrewer2.org,
which are released under the following license:


Copyright (c) 2002 Cynthia Brewer, Mark Harrower, 
and The Pennsylvania State University.

Licensed under the Apache License, Version 2.0 (the "License"); 
you may not use this file except in compliance with the License.
You may obtain a copy of the License at	
http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, 
software distributed under the License is distributed on an 
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
either express or implied. See the License for the specific 
language governing permissions and limitations under the License.


Named colors are taken from X11 Color Names.
http://www.w3.org/TR/css3-color/#svg-color