Table font color

I am displaying thermocouple values in table the table has four columns channel,Description,Limits and values.These are real time values i want to change the color of these values according to the limits that is if it lies in danger zone they should be displayed in red color if in warning zone in blue color or for normal range in black not all the values only those which cross the limit.using switch i can display either of the color but not all color so how do i do it?
eg; I have limit of    +70/-40               if value is in range 67-70 it should be Red
                                                            if value is in range 60-70 it should be Blue
                                                            if value is < 60 it should be Black
similarly for negative range.

I tried your method but its not working properly even the values which are not in the limit are also changing the color. I think you will get better idea by seeing these pictures(it has both front panel as well as block diagram) that what exactly i want to do.Thanks a lot i hope you will reply soon.
Attachments:
Front Panel.JPG ‏237 KB
Block Diagram.JPG ‏182 KB

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