Methods and apparatus are provided for a backlit display with variable luminance and chrominance. The apparatus comprises i groups of LEDs of different colors and one or more sensors optically coupled to the LEDs. The combined light produced by the LEDs is directed to a transmissive liquid crystal display, preferably through a diffusing layer. The sensors monitor the output S.sub.i of each group of LEDs. S.sub.i for each group of LEDs is multiplied by a chrominance determining parameter K.sub.i to obtain K.sub.i*S.sub.i which is then compared to a commanded luminance signal L.sub.C to obtain L.sub.C-K.sub.i*S.sub.i, which difference is used to adjust the drive current to each group of LEDs to achieve L.sub.C with the desired chrominance set by K.sub.i. By changing K.sub.i and L.sub.C the chrominance and luminescence of the display may be varied and aging effects compensated.