If your display is a bit red you might want to check your voltage down the strip when displaying full white. If the strip is not getting enough voltage the display will tend to go warm.
If you think your display always looks a bit too red or green or blue you can also add an overall color correction by adding .setCorrection on the end of the addLeds line.
This example would remove 50% of the Green.
FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS).setCorrection(255,128,255);
This example would remove 10% of the Red.
FastLED.addLeds<LPD8806, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS).setCorrection(230,255,255);