The standard Hollywood gels for color correction are CTB (towards blue) and CTO (towards orange). They come in grades 1/8, 1/4, 1/2, and "Full" from both Lee and Rosco. Full CTB will correct 3200 to about 5500 (with a 70% or so loss of transmission) or vice versa for full CTO (with a 20% or so loss of transmission). The blue filters tend to suffer from fading (because they absorb a lot of energy) unless of the highest quality (like from Lee or Rosco).
CTB and CTO stand for "color temperature blue" and "color temperature orange" respectively.