To use this kind of log space, you need these tools:
for exposure compensation, an offset adjustment that adds the same offset to each of the red, green, and blue channels
for color balancing, individual offset adjustments for each of the red, green, and blue channels, with granularity of 0.001 or finer
for contrast adjustment, a straight-line slope adjustment with a pivot of 0.5 applied to the red, green, and blue channels