Alter Aeon Online Help

Keywords are:  'lightningspells spells colors lightningcolors'

You can change the color of most of your mage lightning spells for 1000
credits, with available colors of red, yellow, green, cyan (blue), and
purple. White is the default color.

The color you buy will change the color of your spells until you buy
a change to a different color (the color does not toggle.)

Use the 'credit buy' command to get more information on how to use
credits to buy the different lightning spell colors.