Using a MCedit filter made by SethBling, it was possible to give a color to text that's being said by command blocks (http://sethbling.com/downloads/mcedit-filters/colorcommandblocktext/) However, if you now power the command block, only the first word is colored.
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That filter was also taking advantage of a feature that was not really intended to be part of the commandblock.
If you use the command there http://minecraft.gamepedia.com/Chat#Chat for the text in color in a command block it won't work and only the first work will be in color.
Does that mean /say command won't support color anymore , as it is the only command for text that support @a @p @r command.
Minecraft basically is breaking all of old features without implementing a way to do it in a better way. With the /tellraw command you can easily create colored text, but can no longer use @p or @a, or @r. They need to implement a way to fix this. or map makers are screwed.
Invalid because of 3rd party tool.
Try to recreate that issue with
/tellrawor/setblock