Magic cards by colour
Magic has five colours, White, Blue, Black, Red and Green, plus the cards with no colour and the gold cards that have two or more. Each colour has a page listing its cards by price, so you can see where a colour's value is concentrated before you build or buy into it.
A card is on one page only: a gold card is under Multicolor, not under each of its colours. Prices are the cheapest in-stock listing in your market; for the cards behind a colour's recent moves, see this week's movers.
In short
White
Order, protection & lifegain
13,156 printings
Top card: Leonardo, Sewer Samurai US$3,002
Blue
Knowledge, counters & tempo
12,626 printings
Top card: Timetwister US$6,400
Black
Death, removal & sacrifice
12,838 printings
Top card: Sheoldred US$3,165
Red
Speed, burn & chaos
12,876 printings
Top card: Smaug the Magnificent US$24,500
Green
Growth, ramp & big creatures
13,164 printings
Top card: Michelangelo, Improviser US$2,483
Colorless
Artifacts, lands and Eldrazi
21,112 printings
Top card: Mox Ruby US$6,400
Multicolor
Two or more colors
13,073 printings
Top card: Avatar Aang US$4,784