Artifacts have no characteristics specific to their card type. Most artifacts have no colored mana symbols in their mana costs, and are therefore colorless. However, there is no correlation between being colorless and being an artifact: artifacts may be colored, and colorless objects may be card types other than artifact.
June 17, 2011 · Commander 2011
Artifacts have no characteristics specific to their card type. Most artifacts have no colored mana
February 4, 2011 · Mirrodin Besieged
Artifacts have no characteristics specific to their card type. Most artifacts have no colored mana symbols in their mana costs, and are therefore colorless. However, there is no correlation between being colorless and being an artifact: artifacts may be colored, and colorless objects may be card types other than artifact.
October 1, 2010 · Scars of Mirrodin
Artifacts have no characteristics specific to their card type. Most artifacts have no colored mana
February 1, 2010 · Worldwake
Artifacts have no characteristics specific to their card type. Most artifacts have no colored mana symbols in their mana costs, and are therefore colorless. However, there is no correlation between being colorless and being an artifact: artifacts may be colored, and colorless objects may be card types other than artifact.