Just to illustrate further what I said in my previous post....
Most modern stadiums use Metal Halide floodlighting. Metal Halide lamps have characteristic spectral peaks in the range 560 to 600 nanometres (in old money, thats 5600 to 6000 Angstroms) but this can vary depending on the power input and wattage rating of the lamps. Yellow is in the range 560 to 590 and orange in the range 590 - 635.
There is a peak at 589 nm and another smaller peak at 545 nm. As input power to a Metal Hydride lamp is decreased, the peak at 589 reduces about the level of the 545-nm peak, and as it is further lowered, the 589-nm peak shifts (changes colour) to around 570 nm.
In layman's terms, lower powered Metal Halide lamps become more "yellow". See the following photos to get an idea how much this spectral shift can change the appearance of colour. On the left is the original photo taken in daylight, on the right, I have used Photoshop to apply a Metal Halide subtraction/correction filter to simulate that type of floodlighting, and used a luminosity reduction filter to simulate the lower overall light level provided by floodlighting.
See how the two jerseys on the left have become the same colour, and the blue colour has almost gone completely from the left player's shorts and the jersey on the right