Color and Maps

Creating new colors in ArcMap

Color Picker Tool in ArcMap

Colors you didn't know existed

Brand Colors

Color Brewer for Maps

•  Download Color Brewer style

Crayola Colors

Wikipedia List of Colors 

Variety of online color palette resources:
*ones that I particularily find useful

• Color Calculator
• Color Palette Generator*
• Color Advice for Maps*
• COLOURlovers
• Colllor
• Colorotate
• 0to255*
• ColorHexa
• Colormunki
• Pictaculous*
• Colorcombos
• Kuler*
• Colorspire
• Copaso
• Sphere*
• Genopal
• Color Scheme Designer
• colr.org
• color hunter
• combo tester*
• colorwizard
• designseeds
• colorgrab
• colorschemer gallery
• hailpixel*
• Raphaeljs picker*
• color codes*
• webcolourdata*