Here's some links I often use in Logo and Jersey design for colors. I think I've posted a couple of these awhile ago, but I still find them very useful.
A Link to team Colors:
Baseball Team Colors
^ Colorwerx has some really nice stuff, if you poke around a bit.
A Link to a very nice color scheme matching site:
Color Schemes and Color Palettes - Combo Library
Another Color Scheme matching tool:
Color Scheme Designer 3
Some very useful colors and their HEX codes (great for Photoshop and such):
Hex Color Codes