Blue

Blue may refer to:
 * Paints, where it is two of many base colors
 * Jeremy Guerette's nickname, a previous Re-Logic employee

Dyes

 * , a base dye color
 * , a base dye color
 * , a mix of dyes
 * , a mix of dyes
 * , a mix of dyes
 * , a mix of dyes
 * , a special dye awarded by the Dye Trader