Note that the underlying programs are capable of shading in any number of arbitrary colors, not just the ones used here.
The map is based on one generated by the Xerox PARC Map Server.
US States: AK Alaska IL Illinois NC N. Carolina SC S. Carolina AL Alabama IN Indiana ND N. Dakota SD S. Dakota AR Arkansas KS Kansas NE Nebraska TN Tennessee AZ Arizona KY Kentucky NH New Hampshire TX Texas CA California LA Louisiana NJ New Jersey UT Utah CO Colorado MA Massachusetts NM New Mexico VA Virginia CT Connecticut MD Maryland NV Nevada VT Vermont DE Delaware ME Maine NY New York WA Washington FL Florida MI Michigan OH Ohio WI Wisconsin GA Georgia MN Minnesota OK Oklahoma WV W. Virginia HI Hawaii MO Missouri OR Oregon WY Wyoming IA Iowa MS Mississippi PA Pennsylvania ID Idaho MT Montana RI Rhode Island US territories: DC Washington, DC PR Puerto Rico VI Virgin Islands Canadian Territories and Provinces: AB Alberta MB Manitoba ON Ontario BC British Columbia MK MacKenzie (NWT) PE Prince Edward I. FR Franklin (NWT) NB New Brunswick QU Quebec KW Keewatin (NWT) NF Newfoundland I. (Newf) SK Saskatchewan LB Labrador (Newf) NS Nova Scotia YT Yukon Terr. Other: PM Saint Pierre and Miquelon GL Greenland MX Mexico