Play with sandbox
From Electrical Installation Guide
x2 − y2
Equations can use color:
It is also possible to change the background color (since r59550), as in the following example:
|Background||Wikicode||Rendering (in PNG)|
Note that color should not be used as the only way to identify something, because it will become meaningless on black-and-white media or for color-blind people. See Wikipedia:Manual of Style (accessibility)#Color.